System forces trace on different occasions. The logs show error messages like below:
20180710/100319.141 - U00015006 System forced memory trace dump.
20180710/100319.142 - U00003631 Dump caused by:
20180710/100319.142 - U00003513 UCUDB: Not all HSTMT have been closed: Number = '2'
20180710/100319.142 - U00011801 Error in Server routine 'UCDS_R ', Server: 'UC4#WP006' AE System: 'UC4'.
The red marked message is the relevant message here. The number at the end can vary.