Why do you need the Mods help? You do know we are in no way connected with TGC or any of it's products? We are exactly like you guys except we have a bit more access to the forum than you do to keep it a nice place.
In fact there are more 'ordinary' (
) folk here who know a lot more than we do so this is just a heads up to those who think we know the inner workings of FPSC as we don't.
Anyway having said that perhaps you got this error after placing a certain entity? Try removing entities one by one (starting from the last and working backwards) and see what happens.
Good luck.
Addendum
Unhelpful Titles
Please do not simply write "Noob Question", "I am a newb", "One Noobie Question", "A question", "Please help", "This isn't working" or anything similar as the title of your post. We have a search facility, and meaningless titles do not help others find answers to their questions. It will also help you to get quicker responses if people have an idea of your thread content.