Help On Comoworks analysis please

Hi, I am building a catapult and want to do a stress analysison it. When i pick the restraints and the forces and click "meshand run" it says it failed. I don't understand why... If anyone hasa little time to spare could you open my file and see if you canget it to work? Its a work in progress. adventually it will havesprings (once i figure out how to do that..)

Thanks,
ChrisSolidworksSimulation