Then the last option I mentioned is the only solution. Just have a whole new kit, and import resources. Of course, manually entering every script edit will probably be incredibly hard, especially if they aren't tagged. When does the error pop up? Is it as soon as you open RMXP? If it happens when you start playtesting then it could be a problem with the scripts, but if it's the moment the program opens, then it's the project itself. I suppose there's another possibility, and that is that RMXP itself may have been corrupted. I sincerely hope that's not the case, and since others with the same error somehow fixed it, I don't think it is. Was it all of a sudden, or after something was changed? It shouldn't need the Actor Data to play, since it's completely blank anyways, with everything related to the player more or less re-written.