Hi All, I tried to build a very simple executable using pyinstaller, where my script just imported clr module. I managed to build the executable but then the executable doesnt run. I have posted the error below. I think the executable is able to find the runtime dll but it is unable to run it. Unhandled Exception: System.IO.FileLoadException: Could not load file or assembl y 'Python.Runtime, Version=4.0.0.1, Culture=neutral, PublicKeyToken=5000fea6cba7 02dd' or one of its dependencies. The located assembly's manifest definition doe s not match the assembly reference. (Exception from HRESULT: 0x80131040) at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String cod eBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntro spection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName as semblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMar k& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIn trospection, Boolean suppressSecurityChecks) at System.Reflection.Assembly.Load(AssemblyName assemblyRef) at clrModule.initclr() I would appreciate any help