>The file name is in the form "xxx xxxxx.xxx". The only way I could get COPY FILE to work was to rename the file 'xxxxxxxx.xxx', copy it , and then rename it to the original name in both places. Whew! One thing complicating the procedure was that I had to append a path to the file. I don't know for sure that made any difference...

COPY FILE "C:\Folder with space\Long File Name.XYZ" TO "C:\Other Folder\New Name.XYZ" should work just fine. That doesn't work for you?