The Oracle command select * from ISTMT does not return any lines
The problem is that ILM tried to acquire an exclusive lock on a table. This acquisition failed the first time and was successful the second time. (See the two alter commands for the object TABLE RT ENABLE NOVALIDATE CONSTRAINT FK_RT_RH).
Release: Component: AAUTEN
Each time this kind of table lock conflict occurs, a U00005323 message will reported in the log.
However, ILM is working correctly. No action are required in this case.
IMPORTANT: Please note that this explanation is exclusively applicable to this particular context where tablelocks took place; But, be aware that U00005323 messages can also be due to other issues with ILM. That is why we advise to always reported and have support analyzed.