ORA-29931: specified association does not exist
Cause: One or more of the object(s) that have been specified to be disassociated, do not have an association defined for them.
Action: Verify the objects which have an association defined and issue the disassociate command again.
ORA-29931是由于检查与指定的类型之间不存在任何关联而引起的错误。
“ORA-29931: specified association does not exist”
这是一个非致命的错误，表明指定的类型之间不存在关联，无法将它们关联起来。