cannot drop log group – nonexistent log group

The specified in alter table drop log group is incorrect or nonexistent.

How to Solve :

Reenter the statement using the correct log group name.

name already used by an existing log group

The specified log group name has to be unique.

How to Solve :

Specify a unique name for the log group. The name cannot be the same as any other log group, constraint, or cluster hash expression.

Index maintainence clause not allowed for this command

The clause INVALIDATE or UPDATE GLOBAL INDEXES is not allowed for this command

Remove clause and reissue operation

cannot access type information

Either a subtype was created and operations performed with this new type while the session was in progress, or the type information was unpinned from the object cache.

Commit necessary changes, end the user session, reconnect again and re-try the object operations. If problem persists, contact your Oracle Support representative.