You asked "how much effort should I put in learning SAS commands? Is it better to use PROC SQL and what I already know or using SAS language is better?"   SAS SQL is a little different then other systems' SQL. You can use SAS functions and some SAS file options within SAS SQL.  SAS Base, in some cases, is shorter in code and more efficient. Sas Base contains statements (commands), functions and many procedures.  Some of these code may differ depending on the SAS platform you use. You should look for a learning program in order to progress efficiently to get a good experience.  ... View more

Thanks for all answers! ... View more

Thanks, I did that. ... View more

The most likely cause would be having a file in the repository still being open in another process. Examples are -  you have a program in the repository open in another SAS Studio window, or you are running one the programs in another SAS session. The approach you are using with RMDIR should work OK, but remember there is also a hidden .git file in a repository that needs to be deleted.   I suggest you raise a track with SAS Tech Support regarding the SAS Studio Git delete function failing. ... View more