Thank you for your reply! I have ALL of that already setup and have successfully modded some MCM menus. This specific error message is eluding me. The lines it points to can be very different from script to script, so I can not determine a consistency, and, I haven't been able to find any reference to "a_flag" anywhere (within any code or researching the Internet). My instinct is telling me that, perhaps, one script needs reference to another script within the mod, but no matter what I've tried I still receive the same error message. I've even attempted to take the working *.pex, run it through Champollion and try to compile the output *.psc; same message. As I mentioned, compiling the original source from the mod raises the error, and this truly stumps me; naturally it had to compiled at least once. I've read through all of schlangster's documentation (well, most of it anyway), but still to no avail. EDIT: I'm not saying my system is not deficient in some way (obviously it must be if others can compile what I can not), its just that I don't have a clue as to how or why. I would find it hard to believe, however, that no one other than myself has encountered such an error. Surely something is askew.