I've gone through and set up my project to simulate conditions my equipment would experience in normal operation. I've incorporated standard and user defined materials and radiation surfaces, etc. However, when I try to run my project, I get this unspecified rebuild error notification. However, there is no indication of what the rebuild area is. I've tried going through and suppressing pieces of input data to try to root out the issue, but I haven't been able to determine what the issue is. The screenshot below shows the message that I receive along with no indication as to what is wrong.