oracle error - ORA-00119: invalid specification for system parameter string

ORA-00119:     invalid specification for system parameter string

Cause:     The syntax for the specified parameter is incorrect.

Action:     Refer to the Oracle Reference Manual for the correct syntax.

oracle error - ORA-00118: Only one of PROTOCOL, ADDRESS or DESCRIPTION may be specified

ORA-00118:     Only one of PROTOCOL, ADDRESS or DESCRIPTION may be specified

Cause:     More than one of PROTOCOL, ADDRESS or DESCRIPTION was specified.


Action:     Use only one of the attributes: PROTOCOL, ADDRESS or DESCRIPTION to specify the listening address for dispatchers.

oracle error - ORA-00117: PROTOCOL, ADDRESS or DESCRIPTION must be specified

ORA-00117:     PROTOCOL, ADDRESS or DESCRIPTION must be specified

Cause:     PROTOCOL, ADDRESS or DESCRIPTION was not specified.

Action:     Use one of the attributes: PROTOCOL, ADDRESS or DESCRIPTION to specify the listening address for dispatchers.

oracle error - ORA-00097: use of Oracle SQL feature not in SQL92 string Level

ORA-00097:      use of Oracle SQL feature not in SQL92 string Level

Cause:     Usage of Oracle's SQL extensions.

Action:     none

oracle error - ORA-00096: invalid value string for parameter string, must be from among string

ORA-00096:     invalid value string for parameter string, must be from among string

Cause:     The value for the initialization parameter is invalid.

Action:     Choose a value as indicated by the message.

oracle error - ORA-00094: %s requires an integer value

ORA-00094:      %s requires an integer value

Cause:     The parameter value is not an integer.

Action:     Modify the parameter value to be an integer.

oracle error - ORA-00093: %s must be between string and string

ORA-00093:      %s must be between string and string

Cause:     The parameter value is not in a valid range.

Action:     Modify the parameter value to be within the specified range.

oracle error - ORA-00092: LARGE_POOL_SIZE must be greater than LARGE_POOL_MIN_ALLOC

ORA-00092:     LARGE_POOL_SIZE must be greater than LARGE_POOL_MIN_ALLOC

Cause:     The value of LARGE_POOL_SIZE is less than the value of LARGE_POOL_MIN_ALLOC.

Action:     Increase the value of LARGE_POOL_SIZE past the value of LARGE_POOL_MIN_ALLOC.

oracle error - ORA-00091: LARGE_POOL_SIZE must be at least string

ORA-00091:     LARGE_POOL_SIZE must be at least string

Cause:     The value of LARGE_POOL_SIZE is below the minimum size.

Action:     Increase the value of LARGE_POOL_SIZE past the minimum size.

ORA-00090: failed to allocate memory for cluster database ORADEBUG command

ORA-00090:     failed to allocate memory for cluster database ORADEBUG command

Cause:     Could not allocate memory needed to execute cluster database oradebug.

Action:     Reissue the command on each instance with single-instance oradebug.

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ORA-00089: invalid instance number in ORADEBUG command

ORA-00089:    invalid instance number in ORADEBUG command

Cause:     An invalid instance number was specified in a cluster database ORADEBUG command.

Action:     Reissue the command with valid instance numbers.

ORA-00088: command cannot be executed by shared server

ORA-00088:     command cannot be executed by shared server

Cause:     Debug command issued on shared server.

Action:     Reissue the command using a dedicated server.

Política de privacidade

"Este site pode utilizar cookies e/ou web beacons quando um usuário tem acesso às páginas. Os cookies que podem ser utilizados associam-se (se for o caso) unicamente com o navegador de um determinado computador.
Os cookies que são utilizados neste site podem ser instalados pelo mesmo, os quais são originados dos distintos servidores operados por este, ou a partir dos servidores de terceiros que prestam serviços e instalam cookies e/ou web beacons (por exemplo, os cookies que são empregados para prover serviços de publicidade ou certos conteúdos através dos quais o usuário visualiza a publicidade ou conteúdos em tempo pré determinados). O usuário poderá pesquisar o disco rígido de seu computador conforme instruções do próprio navegador. O Google, como fornecedor de terceiros, utiliza cookies para exibir anúncios neste site.
Com o cookie DART, o Google pode exibir anúncios para seus usuários com base nas visitas feitas a este site.
Você pode desativar o cookie DART visitando a Política de privacidade da rede de conteúdo e dos anúncios do Google.
Usuário tem a possibilidade de configurar seu navegador para ser avisado, na tela do computador, sobre a recepção dos cookies e para impedir a sua instalação no disco rígido. As informações pertinentes a esta configuração estão disponíveis em instruções e manuais do próprio navegador".

Este site respeita e procura responder todos os e-mails enviados.

Após a leitura este site apaga todos os endereços de e-mail enviados.

Este site se reserva no direito de utilizar emails cadastrado nas promoçoes para envio de newsletter do nosso site e parceiros nas promocoes, mediante aceite do usuário, reservando o direito do usuário excluir seu email do cadastro.

oracle error - ORA-00087: command cannot be executed on remote instance

ORA-00087: command cannot be executed on remote instance

Cause: Cluster database command issued for non cluster database ORADEBUG command.

Action: Issue the command without the cluster database syntax.

oracle error - ORA-00086: user call does not exist

ORA-00086:  user call does not exist

Cause: An invalid attempt was made to dump the user call heap.

Action: Wait until the process starts a call.

oracle error - ORA-00085: current call does not exist

ORA-00085:  current call does not exist

Cause: An invalid attempt was made to dump the current call heap.

Action: Wait until the process starts a call.

oracle error - ORA-00084: global area must be PGA, SGA, or UGA

ORA-00084:  global area must be PGA, SGA, or UGA

Cause: An attempt was made to dump an invalid global area.

Action: Specify either PGA, SGA, or UGA.

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oracle error - ORA-00083: warning: possibly corrupt SGA mapped

ORA-00083:  warning: possibly corrupt SGA mapped

Cause: Even though there may be SGA corruptions, the SGA was mapped.

Action: Use the DUMPSGA command to dump the SGA.

oracle error- ORA-00081: address range [string, string) is not readable

ORA-00081: address range [string, string) is not readable

Cause: An attempt was made to read/write an invalid memory address range.

Action: Try another address or length.

oracle error- ORA-00080: invalid global area specified by level string

ORA-00080:  invalid global area specified by level string

Cause: An attempt was made to dump an invalid global area.

Action: Use level 1 for the PGA, 2 for the SGA, and 3 for the UGA. Use <extra + level> to dump global area <level> as well as <extra> bytes for every pointer; <extra> must be a multiple of 4.

oracle error- ORA-00079: variable string not found

ORA-00079:  variable string not found

Cause: An attempt was made to dump a variable that does not exist.

Action: Use a valid variable name.

oracle error- ORA-00076: dump string not found

ORA-00076: dump string not found

Cause: An attempt was made to invoke a dump that does not exist.

Action: Type DUMPLIST to see the list of available dumps.

oracle error- ORA-00078: cannot dump variables by name

ORA-00078:  cannot dump variables by name

Cause: An attempt was made to dump a variable by name on a system that does not support this feature.

Action: Try the PEEK command.

oracle error- ORA-00075: process "string" not found in this instance

ORA-00075: process "string" not found in this instance

Cause: The specified process was not logged on to the current instance.

Action: Specify a valid process.

oracle error- ORA-00074: no process has been specified

ORA-00074:  no process has been specified

Cause: No debug process has been specified.

Action: Specify a valid process.

oracle error- ORA-00073: command string takes between string and string argument(s)

ORA-00073: command string takes between string and string argument(s)

Cause: An incorrect number of arguments was specified.

Action: Specify the correct number of arguments. Type HELP to see the list of commands and their syntax.

oracle error- ORA-00072: process "string" is not active

ORA-00072:  process "string" is not active

Cause: An invalid process was specified.

Action: Specify a valid process.

oracle error- ORA-00071: process number must be between 1 and string

ORA-00071:  process number must be between 1 and string

Cause: An invalid process number was specified.

Action: Specify a valid process number.

oracle error- ORA-00070: command string is not valid

ORA-00070:  command string is not valid

Cause: An invalid debugger command was specified.

Action: Type HELP to see the list of available commands.

oracle error- ORA-00069: cannot acquire lock -- table locks disabled for string

ORA-00069:  cannot acquire lock -- table locks disabled for string

Cause: A command was issued that tried to lock the table indicated in the message. Examples of commands that can lock tables are: LOCK TABLE, ALTER TABLE ... ADD (...), and so on.

Action: Use the ALTER TABLE ... ENABLE TABLE LOCK command, and retry the command.

oracle error - ORA-00068: invalid value string for parameter string, must be between string and string

ORA-00068:  invalid value string for parameter string, must be between string and string

Cause: The value for the initialization parameter is invalid.

Action: Choose a value as indicated by the message.

oracle error - ORA-00067: invalid value string for parameter string; must be at least string

ORA-00067:  invalid value string for parameter string; must be at least string

Cause: The value for the initialization parameter is invalid.

Action: Choose a value as indicated by the message.

oracle error - ORA-00066: LOG_FILES is string but needs to be string to be compatible

ORA-00066: LOG_FILES is string but needs to be string to be compatible

Cause: The maximum number of log files supported by this instance is not the same as for the other instances. All instances must be able to open all the files any instance can open.

Action: Change the value of the LOG_FILES initialization parameter to be compatible.

oracle error - ORA-00065: initialization of FIXED_DATE failed

ORA-00065:  initialization of FIXED_DATE failed

Cause: The FIXED_DATE string was not in date format yyyy-mm-dd:hh24:mi:ss.

Action: Make sure the initialization parameter is in the correct date format.

oracle error - ORA-00064: object is too large to allocate on this O/S (string,string)

ORA-00064:  object is too large to allocate on this O/S (string,string)

Cause: An initialization parameter was set to a value that required allocating more contiguous space than can be allocated on this operating system.

Action: Reduce the value of the initialization parameter.

oracle error - ORA-00063: maximum number of log files exceeded string

ORA-00063:  maximum number of log files exceeded string

Cause: The number of log files specificied exceeded the maximum number of log files supported in this release.

Action: Re-create the control file with the highest number of log files no greater than the maximum supported in this release.

oracle error - ORA-00062: DML full-table lock cannot be acquired; DML_LOCKS is 0

ORA-00062:  DML full-table lock cannot be acquired; DML_LOCKS is 0

Cause: The instance was started with DML_LOCKS = 0, and the statement being executed needs a full-table lock (S, X, or SSX).

Action: Restart the instance with DML_LOCKS not equal to zero, and reexecute the statement.

oracle error - ORA-00061: another instance has a different DML_LOCKS setting

ORA-00061:  another instance has a different DML_LOCKS setting

Cause: The shared instance being started is using DML locks, and the running instances are not, or vice-versa.

Action: Ensure that all instances' INIT.ORA files specify the DML_LOCKS parameter as 0 or all as non-zero.

oracle error - ORA-00060: deadlock detected while waiting for resource

ORA-00060:  deadlock detected while waiting for resource

Cause: Transactions deadlocked one another while waiting for resources.

Action: Look at the trace file to see the transactions and resources involved. Retry if necessary.

oracle error - ORA-00059: maximum number of DB_FILES exceeded

ORA-00059:  maximum number of DB_FILES exceeded

Cause: The value of the DB_FILES initialization parameter was exceeded.

Action: Increase the value of the DB_FILES parameter and warm start.

oracle error - ORA-00058: DB_BLOCK_SIZE must be string to mount this database (not string)

ORA-00058: DB_BLOCK_SIZE must be string to mount this database (not string)

Cause: DB_BLOCK_SIZE initialization parameter is wrong for the database being mounted. It does not match the value used to create the database.

Action: Fix the value of the DB_BLOCK_SIZE parameter or mount a database that matches the value.

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oracle error- ORA-00055: maximum number of DML locks exceeded

ORA-00055:  maximum number of DML locks exceeded

Cause:     Ran out of DML lock state objects.

Action:     Increase the value of the DML_LOCKS initialization parameter and warm 

start.

oracle error- ORA-00053: maximum number of enqueues exceeded

ORA-00053: maximum number of enqueues exceeded

Cause:     Ran out of enqueue state objects.

Action:     Increase the value of the ENQUEUES initialization parameter.

SPFILE: Criando um arquivo de inicialização

O SPFILE é uma arquivo binário mantido pelo servidor, que possibilita alterações persistentes.

 Algumas características do SPFILE:

 Reside sempre do lado servdior;
 Pode auto ajustar parametros;

 Possibilita suporte ao recovery manager o backup dos arquivos de parametros;
Pode ser craido a partir de um arquivo PFILE.
Pode ser executado antes ou depois da inicialização da instância.


 Ex: Criando um arquivo SPILE a partir de um PFILE:

 create SPILE='$oracle_home/dbs/spfileoracledba01.ora' from PFILE ='$oracle_home/dbs/initoracledba01.ora';

 Exemplo de arquivo SPFILE:

 *.background_dump_dest='/home/brasil01/ADMIN/BDUMP'
*.compatible='9.2.0'
*.control_files='/home/brasil01/ORADATA/u01/ctrl01.ctl'
*.core_dump_dest='/home/brasil01/ADMIN/CDUMP'
*.db_block_size=4096
*.db_name='dba01'
*.db_domain='world'
*.global_names=TRUE
*.instance_name='brasil01'
*.remote_login_passwordfile='exclusive'
*.java_pool_size=50000000
*.shared_pool_size=50000000
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS'

oracle error- ORA-00051: timeout occurred while waiting for a resource

ORA-00051: timeout occurred while waiting for a resource

Cause:     Usually due to a dead instance.

Action:     Check for any dead, unrecovered  instances and recover them.

oracle error- ORA-00050: operating system error occurred while obtaining an enqueue

ORA-00050: operating system error occurred  while obtaining an enqueue

Cause:     Could not obtain the operating system   resources necessary to cover an oracle enqueue. 

This is normally the result of an operating  system user quota that is too low.

Action:     Look up the operating system  error in your system documentation and perform 

the needed action.

oracle error- ORA-00041: active time limit exceeded - session terminated

ORA-00041: active time limit exceeded - session terminated

Cause:     The Resource Manager SWITCH_TIME limit was exceeded.

Action:     Reduce the complexity of the update or query, or contact your database 

administrator for more information.

oracle error- ORA-00040: active time limit exceeded - call aborted

ORA-00040: active time limit exceeded - call aborted

Cause:     The Resource Manager SWITCH_TIME limit was exceeded.

Action:     Reduce the complexity of the update or query, or contact your database 

administrator for more information.

oracle error- ORA-00042: Unknown Service name string

ORA-00042: Unknown Service name string

Cause:     An attempt was made to use an invalid application service.

Action:     Use a valid service name from SERVICE$ or add a new service using the 

DBMS_SERVICE package.

oracle error - ORA-00082: memory size of string is not in valid set of [1], [2], [4]stringstringstringstringstring

ORA-00082:  memory size of string is not in valid set of [1], [2], [4]stringstringstringstringstring

Cause: An invalid length was specified for the POKE command.

Action: Use a valid length (either 1, 2, 4, or possibly 8).

oracle error- ORA-00057: maximum number of temporary table locks exceeded

ORA-00057:     maximum number of temporary table locks exceeded

Cause:     The number of temporary tables equals or exceeds the number of temporary table locks. 

Temporary tables are often created by large sorts.

Action:     Increase the value of the TEMPORARY_TABLE_LOCKS initialization parameter 

and warm start.

oracle error- ORA-00056: DDL lock on object 'string.string' is already held in an incompatible mode

ORA-00056: DDL lock on object 'string.string' is already held in an incompatible mode

Cause:     An attempt was made to acquire a DDL lock that is already locked.

Action:     This happens if you attempt to drop a table that has parse locks on it.

oracle error- ORA-00054: resource busy and acquire with NOWAIT specified

ORA-00054: resource busy and acquire with  NOWAIT specified

Cause:     Resource interested is busy.

Action:     Retry if necessary.

oracle error- ORA-00052: maximum number of enqueue resources (string) exceeded

ORA-00052:     maximum number of enqueue  resources (string) exceeded

Cause:     Ran out of enqueue resources.

Action:     Increase the value of the ENQUEUE_RESOURCES initialization parameter.

oracle error- ORA-00029: session is not a user session

ORA-00029:  session is not a user session

Cause:     The session ID specified in an ALTER SYSTEM KILL SESSION command was not a user
session (for example, recursive, etc.).

Action:     Retry with a user session ID.

oracle error- ORA-00038: Cannot create session: server group belongs to another user

ORA-00038: Cannot create session: server group belongs to another user

Cause:     An attempt was made to create a non-migratable session in a server group that 

is owned by a different user.

Action:     A server group is owned by the first user who logs into a server in the server 

group in non-migratable mode. All subsequent non-migratable mode logins must be made by the 

user who owns the server group. To have a different user login in non-migratable mode, 

the ownership of the server group will have to be changed. This can be done by logging off all 

current sessions and detaching from all existing servers in the server group and then 

having the new user login to become the new owner.

ORA-00037: cannot switch to a session belonging to a different server group

ORA-00037: cannot switch to a session belonging to a different server group

Cause:     An attempt was made to switch to a session in a different server group. This is 

not allowed.

Action:     Make sure the server switches to a session that belongs to its server group.

oracle error- ORA-00036: maximum number of recursive SQL levels (string) exceeded

ORA-00036: maximum number of recursive SQL levels (string) exceeded

Cause:     An attempt was made to go more than the specified number of recursive SQL levels.

Action:     Remove the recursive SQL, possibly a recursive trigger.

oracle error- ORA-00034: Cannot string in current PL/SQL session

ORA-00034:  Cannot string in current PL/SQL session

Cause:     An attempt was made to issue a commit  or rollback from a PL/SQL object (procedure, 

function, package) in a session that has this disabled (by 'alter session disable commit in 

procedure')

Action: Enable commits from PL/SQL in this session, or do not attempt to use commit or 

rollback in PL/SQL when they are disabled in the current session.

oracle error- ORA-00033: current session has empty migration password

ORA-00033: current session has empty migration password

Cause:     An attempt was made to detach or clone the current session and it has an empty 

migration password. This is not allowed.

Action:     Create the session with a non-empty migration password.

oracle error- ORA-00032: invalid session migration password

ORA-00032: invalid session migration password

Cause:     The session migration password specified in a session creation call was invalid (probably too long).

Action:     Retry with a valid password (less than 30 chars).

oracle error- ORA-00031: session marked for kill

ORA-00031:  session marked for kill

Cause:     The session specified in an ALTER SYSTEM KILL SESSION command cannot be killed 

immediately (because it is rolling back or blocked on a network operation), but it has  been marked for kill. This means it will be  killed as soon as possible after its current  uninterruptable operation is done.

Action:     No action is required for the  session to be killed, but further executions of  the ALTER SYSTEM KILL SESSION command on this  session may cause the session to be killed sooner.

oracle error- ORA-00030: User session ID does not exist.

ORA-00030: User session ID does not exist.

Cause:     The user session ID no longer exists, probably because the session was logged out.

Action:     Use a valid session ID.

oracle error- ORA-00029: session is not a user session

ORA-00029:  session is not a user session

Cause:     The session ID specified in an ALTER SYSTEM KILL SESSION command was not a user
session (for example, recursive, etc.).

Action:     Retry with a user session ID.

oracle error- ORA-00028: your session has been killed

ORA-00028:  your session has been killed

Cause:     A privileged user has killed your  session and you are no longer logged on to the 

database.

Action:     Login again if you wish to  continue working.

oracle error- ORA-00027: cannot kill current session

ORA-00027:  cannot kill current session

Cause:     Attempted to use ALTER SYSTEM KILL SESSION to kill the current session.

Action:     None.

oracle error- ORA-00026: missing or invalid session ID

ORA-00026:  missing or invalid session ID

Cause:     Missing or invalid session ID string for ALTER SYSTEM KILL SESSION.

Action:     Retry with a valid session ID.

oracle error- ORA-00025: failed to allocate string

ORA-00025:  failed to allocate string

Cause:     Out of memory.

Action:     Restart with larger sga heap.

oracle error- ORA-00024: logins from more than one process not allowed in single-process mode

ORA-00024: logins from more than one process not allowed in single-process mode

Cause:     Trying to login more than once from  different processes for ORACLE started in
single-process mode.

Action:     Logoff from the other process.

oracle error- ORA-00023: session references process private memory; cannot detach session

ORA-00023: session references process private memory; cannot detach session

Cause: An attempt was made to detach the current session when it contains references to
process private memory.

Action: A session may contain references to process memory (PGA) if it has an
open network connection, a very large context area, or operating system privileges. To allow
the detach, it may be necessary to close the session's database links and/or cursors.
Detaching a session with operating system privileges is always disallowed.

ORA-00022: invalid session ID; access denied

ORA-00022: invalid session ID; access denied

Cause:     Either the session specified does not exist or the caller does not have the privilege
to access it.

Action:     Specify a valid session ID that you have privilege to access, that is either
you own it or you have the CHANGE_USER privilege.

Show routing table cisco

MyRouter>en
MyRouter#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 2 subnets
C       172.16.10.0 is directly connected, FastEthernet0/0
S       172.16.20.0 [1/0] via 192.168.2.2
     192.168.2.0/30 is subnetted, 1 subnets
C       192.168.2.0 is directly connected, Serial0/1/0

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Mostrar tabela de roteamento em router da cisco

Mostrar a tabela de roteamento  em um router cisco é muito simples basta digitar o comando show ip route ou sh ip route no modo privilegiado como no exemplo abaixo:


MyRouter>en
MyRouter#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 2 subnets
C       172.16.10.0 is directly connected, FastEthernet0/0
S       172.16.20.0 [1/0] via 192.168.2.2
     192.168.2.0/30 is subnetted, 1 subnets
C       192.168.2.0 is directly connected, Serial0/1/0

Error oracle- ORA-00021: session attached to some other process; cannot switch session

ORA-00021: session attached to some other process; cannot switch session

Cause:     The user session is currently used by others.

Action:     Do not switch to a session attached to some other process.

Error oracle- ORA-00020: maximum number of processes (string) exceeded

ORA-00020: maximum number of processes (string) exceeded

Cause:     All process state objects are in use.

Action:     Increase the value of the PROCESSES initialization parameter.

Error oracle- ORA-00019: maximum number of session licenses exceeded

ORA-00019: maximum number of session licenses exceeded

Cause:     All licenses are in use.

Action: Increase the value of the LICENSE MAX SESSIONS initialization parameter.

Error oracle- ORA-00018: maximum number of sessions exceeded

ORA-00018:  maximum number of sessions exceeded

Cause:     All session state objects are in use.

Action:     Increase the value of the SESSIONS initialization parameter.

Error oracle- ORA-00017: session requested to set trace event

ORA-00017:  session requested to set trace event

Cause:     The current session was requested to set a trace event by another session.

Action:     This is used internally; no action is required.

Error oracle- ORA-00001: unique constraint (string.string) violated

ORA-00001:  unique constraint (string.string) violated

Cause:     An UPDATE or INSERT statement attempted to insert a duplicate key. For Trusted Oracle configured in DBMS MAC mode, you may see this message if a duplicate entry exists at a different level.

Action:     Either remove the unique restriction or do not insert the key.

Error oracle- ORA-00000- normal, successful completion

ORA-00000:   normal, successful completion   

Cause:     Normal exit.

Action:     None.

Error oracle- ORA-00904: string: invalid identifier

Cause:    The column name entered is either missing or invalid.

Action:    Enter a valid column name. A valid column name must begin with a letter, be less than or equal to 30 characters, and consist of only alphanumeric characters and the special characters $, _, and #. If it contains other characters, then it must be enclosed in double quotation marks. It may not be a reserved word.

Error oracle- ORA-06512: at stringline string

Cause:     Backtrace message as the stack is unwound by unhandled exceptions.

Action: Fix the problem causing the exception or write an exception handler for this condition. Or you may need to contact your application administrator or DBA.

Error oracle- ORA-12154:TNS:could not resolve the connect identifier specified

Cause:	A connection to a database or other service was requested using a connect identifier, and the connect identifier specified could not be resolved into a connect descriptor using one of the naming methods configured. For example, if the type of connect identifier used was a net service name then the net service name could not be found in a naming method repository, or the repository could not be located or reached.
Action:	- If you are using local naming (TNSNAMES.ORA file): - Make sure that "TNSNAMES" is listed as one of the values of the NAMES.DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.ORA) - Verify that a TNSNAMES.ORA file exists and is in the proper directory and is accessible. - Check that the net service name used as the connect identifier exists in the TNSNAMES.ORA file. - Make sure there are no syntax errors anywhere in the TNSNAMES.ORA file. Look for unmatched parentheses or stray characters. Errors in a TNSNAMES.ORA file may make it unusable. - If you are using directory naming: - Verify that "LDAP" is listed as one of the values of the NAMES.DIRETORY_PATH parameter in the Oracle Net profile (SQLNET.ORA). - Verify that the LDAP directory server is up and that it is accessible. - Verify that the net service name or database name used as the connect identifier is configured in the directory. - Verify that the default context being used is correct by specifying a fully qualified net service name or a full LDAP DN as the connect identifier - If you are using easy connect naming: - Verify that "EZCONNECT" is listed as one of the values of the NAMES.DIRETORY_PATH parameter in the Oracle Net profile (SQLNET.ORA). - Make sure the host, port and service name specified are correct. - Try enclosing the connect identifier in quote marks. See the Oracle Net Services Administrators Guide or the Oracle operating system specific guide for more information on naming.

Error oracle- ORA-00056

ORA-00056:	DDL lock on object 'string.string' is already held in an incompatible mode
Cause:	An attempt was made to acquire a DDL lock that is already locked.
Action:	This happens if you attempt to drop a table that has parse locks on it.