Just checking for INT part, the bug affects also MEP add on, in case of stretching. I don't have MEP, I simply declared < isavailable = 1 >
For curiousity, looking at this same part since versions 7 to 12, shows a collection of bugs.
Each new release fixing some previous bugs and adding a new one.
Drawindex number, fill resolution, lines not joining, 2D tap and drain position, etc... pathetic!
IMHO, better for GS to trash this part and build a new one from scratch, with pure GDL, not from an auto scripted object.