This mistake normally indicates that you have challenge with IronPython. The easiest and fastest technique to verify if this is the circumstance here is to go towards your D:Plan Data filesANSYSv191commonfilesIronPython , then double-click the 'ipy.exe' . Some identical mistake concept need to pop-up while in the CMD Prompt. http://tituslngeo.pointblog.net/The-5-Second-Trick-For-ansys-fluent-engineering-assignment-help-20540712