I am desperate for some help. For some reason when I run the simulator for my part it seems to take a long time to prepare then throws up " Unknown exception by reading and parsing the XML file. Machine definition could not be loaded." I really don't want to run this part without simulating it first. Too much into it already. I tried simulating some older programs and they run fine. I have shut down the computer and re started it with no change. I have a real tight deadline on this and really need to solve this.