ORA-00088 Command cannot be executed by shared server

Error Code
ORA-00088

Description
Command cannot be executed by shared server.

Cause
Possible cause of this error is, debug command issued on shared server.

Action
To fix this error, reissue the command using a dedicated server.

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ORA-00087 Command cannot be executed on remote instance

Error Code
ORA-00087

Description
Command cannot be executed on remote instance.

Cause
Possible cause of this error is, cluster database command issued for non cluster database ORADEBUG command.

Action
To fix this error, issue the command without the cluster database syntax.

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ORA-00086 User call does not exist

Error Code
ORA-00086

Description
User call does not exist

Cause
Possible cause of this error is, an invalid attempt was made to dump the user call heap.

Action
To fix this error, wait until the process starts a call.

reference

ORA-00085 Current call does not exist

Error Code
ORA-00085

Description
Current call does not exist

Cause
Possible cause of this error is, an invalid attempt was made to dump the current call heap.

Action
To fix this error, wait until the process starts a call.

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ORA-00084 Global area must be PGA, SGA, or UGA

Error Code
ORA-00084

Description
Global area must be PGA, SGA, or UGA

Cause
Possible cause of this error is, an attempt was made to dump an invalid global area.

Action
To fix this error, specify either PGA, SGA, or UGA.

reference