Basic functionality = the *run* button not working

[Hans82031]

I just want to assemble a a number of pdf files into one document.
My procedure:

• setting up the file list as usual
• defining the output file
• hit the "run" button but nothing is happening: . no progress in the run bar . no file produced I'm not sure: -is it mandatory to fill anything else? e,g,, the other settings that are listed? Please help: I#m working on a Tax Declaration: I did not have this problem last year, with an older version of PDFsam Thanks so much.