When using an executive variable (vara.exec) that has a return over 6k, the return value is truncated and you see the following:
2/16/2021 07:59:34 PM U00015006 System forced memory trace dump.
2/16/2021 07:59:33 PM U00000003 TRUNCATED
2/16/2021 07:59:33 PM U00011801 Error in Server routine 'UCDVAR_R', Server: 'AUTOMIC#WP006' AE system: 'AUTOMIC'.
Improper memory handler
Release : 12.3
Component : AUTOMATION ENGINE
Will be fixed in future release.