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1. The available main memory is not sufficient to open a database session. The maximum main memory available is determined by the database parameter CAT_CACHE_SUPPLY when installing the database instance.
2. The available main memory is not sufficient to execute the desired database procedure.
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1. You can only open a session when at least one other user has terminated his session. A check should be made as to whether the value of the database parameter CAT_CACHE_SUPPLY is large enough.
2. Try to execute the database procedure at a later time.