Result files not available

I am trying to run a simple thermal analysis, but the analysis fails every time. I can run other analyses and they work fine and I can access result files. After my thermal analysis fails, it gives me the error "Results files not available..." even though I can see the .CWR file in the directory that my assembly is in. I have changed the default directory for result files under simulation options to my current directory and the current directory under the current study options. I have tried pack and go including keeping the result files to another directory.