Hello @HN2001 ,
this seems to a problem with the SASDM, the Enhanced Editor on Windows. I have seen this issue in the past due to several reasons. I could imagine there is something wrong on a library (mainly when you use a non-English language/locale) or the Windows Registry.
I would suggest the following approaches, in order. If one works, you won't need to take the following ones:
1- Check the latest hotfixes available for your installation, and install if any is relevant to your issue.
2- Reinstall SAS
3- Check the following SAS notes
https://support.sas.com/kb/15/185.html
https://support.sas.com/kb/38/222.html
https://support.sas.com/kb/18/120.html
https://support.sas.com/kb/33/427.html
4- Contact SAS Tech Support
Of course, you can contact SAS Tech Support right away, the steps are only there because perhaps they could give you quick solutions to your problem.