Error processing command line arguments: An error occured whilst trying to determine the file version.

Hi everyone, 

Yesterday there appeared this error message, after a short power cut at home. 

When I tried to recover the project and the files, there appeared this message: Error processing command line arguments: An error occured whilst trying to determine the file version.

I tried these workarounds https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039395 but the problem is not solved. 

I'll appreciate your comments and suggestions! 

Regards Nancy