https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10337358#M25867 <P>Thinks. The program&nbsp;sometimes can work on revit 2021. If it throws exception, will throw that message. I have used another way to do.</P> Tue, 25 May 2021 09:11:15 GMT Anonymous 2021-05-25T09:11:15Z https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10329120#M25865 <P>I want to get&nbsp; types of plugin dll by another exe. So, I loaded the&nbsp; 'RevitAPIUI.dll' in revit installed path.</P><P>I started ok. Now, I don't know why give me the exception message.</P> Fri, 21 May 2021 11:57:40 GMT https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10329120#M25865 Anonymous 2021-05-21T11:57:40Z https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10329416#M25866 <P>You cannot load RevitAPI.dll or RevitAPIUI.dll yourself. Only Revit.exe can make use of those.</P> <P>&nbsp;&nbsp;</P> Fri, 21 May 2021 13:57:27 GMT https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10329416#M25866 jeremy_tammik 2021-05-21T13:57:27Z https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10337358#M25867 <P>Thinks. The program&nbsp;sometimes can work on revit 2021. If it throws exception, will throw that message. I have used another way to do.</P> Tue, 25 May 2021 09:11:15 GMT https://forums.autodesk.com/t5/revit-api-forum/the-c-module-failed-to-load-during-process-initialization/m-p/10337358#M25867 Anonymous 2021-05-25T09:11:15Z