The call is in a correct way if it is done in one line. If you just enter /opt/gngeo/bin/gngeo, does it give a help page, or a permission denied? I cannot imagine /home/user/MyDocs/aof.zip will have permission issues. Just entering /home/user/MyDocs/aof.zip will give a permission denied, because it is not executable. So the call in one line must be: /opt/gngeo/bin/gngeo /home/user/MyDocs/aof.zip