By setting TMPDIR to point to a direcotry containing a space in its name I too see an "empty string" error. Adding escaped quotes to the last %s in the call to os.popen3() seems to help.
By setting TMPDIR to point to a direcotry containing a space in its name I too see an "empty string" error. Adding escaped quotes to the last %s in the call to os.popen3() seems to help.