I have been working on nonlinear sims and adjusting the load to get the results I was looking for.  Had no problems running the simulation or viewing the results.   Without changing anything only the nonlinear simulations started giving me the error " Part1-Study 1: Failed ".  No other warnings, boxes, or what not.  I can run any other simulation without getting this error.  Even testing a simple beam gives the error.   Also reinstalled the program.....   Haven't seen any issues like this searching around.   Let me know if you want specifics I will be glad to provide them.  Any suggestions?