Issue arises when you are using the assembly and disassembly function, the error reads as a “Mandatory Dimensions” issue when no dimensions are being used.

Issue is a bug on the v12 patch 27 at the moment and needs to be, either updated to a newer patch level or copy the below TRT files from the TRT folder of a newer environment. 

The files that need to be copied into the TRT folder are

TRT/SUBBBYA

TRT/SUBDBYA

Please ensure that you perform this in the TEST folder and TEST thoroughly before implementing in the LIVE environment.

The bug has been repaired in patch 28 and upward.