Using IBM DB2 as Automation Engine database, the JCP and JWP fail or will not even start with error:
20180921/123005.891 - 42 SQL Statement which caused this DB error:
20180921/123005.891 - 42 Unable to get metadata for 'AH'.
20180921/123006.001 - 43 U00003432 Termination of Server 'UC4#WP005' initiated.
It can affect any table, it must not always be the table AH as in the example above.