Hello-
I came across this nugget during a DRYRUN that i created after having patched to V12P23. As you know, there is a Dictionary copy (ACOPDIC) function that allows you to copy elements between folders, and as luck would have it--there is a bug in the code that has it calling a table abreviation that it hadn't yet opened. I was able to write in a workaround within SUBAVW.src, and i have reported it to Sage support.
I hope this saves you some headache?!?