To those that haven't experienced this error, it only happens if you have added a depreciable item to that activity.  I have called them three times about this, and they have no answer other than wait.  I also have removed the error checking when e-filing these returns, but, as was said earlier, that defeats the purpose.  So I send it once, let it reject, make sure that is the only error, then remove the error checking.  This has been the absolute worst year for late forms and lack of answers to questions!