ISOGEN freezing CADworx when I attempt to ISO a Line

ISOGEN will work on just about any other line, but one specifically will freeze the program and force me to Ctrl Alt Delete and end program. Normally in a failed line it would just pop up with a Pass1 etc. and tell you the line could not be processed. Unfortunately like I said the program just does not respond after I hit accept to run ISOGEN. I've come across this issue before but I think I just had to restart my PC that time, but now it doesn't work at all.

I run AutoCAD 2011 with CADWorx Plant Pro 2010.

*I noticed that ISOGEN creates "TAP for Stub-In" at certain points. I have no idea what this means, but I assume it could be of some use.*