1. E_OP04C0_NEWENUMFAILURE which may be the cause of deadlocks because the query execution plan fails.  We will have to check if this is a bug.\nAnswer #1: The E_OP04C0 error is trying to take advantage if Greedy Optimization method fails. This is not the actual cause of the error but this is the notification error that the query execution is already failing.\n\n\n2. Numerous E_DM9045_TABLE_DEADLOCK on the system.\n3. E_QE0002_INTERNAL_ERROR. A QEF inter error occured.\nAnswer #2 and #3: Table deadlocks and efficiency of the query execution relies on proper housekeeping. \nAlways run optimizedb -zk -zfq, usermod at least every week.  Last run 14-Apr 2022.\nThe server is already running 287 days, please schedule a server reboot once in a while.  \n\n4. E_US0010. Database does not exist: 'mrddocs'.\nAnswer #4. Multiple users are trying to access this mrddocs table but does not exist.\nCheck on this as well. \n\n5. Still running an old version of patch -- 15683.  We already have 15744 for April 2022 patch update.\nAnswer #5: Patch 15744 was superceded by Patch 15753 released May 9, 2022.  I would suggest to test this patch and apply to production environment once tested ok.\n\n