Steve, I am very sorry to have put you on a wild goose chase, but indeed I did not have any current files. I did not notice but my GEMPAK dcmetr decoder stopped writing output on May 1..so it couldn't see any data files. dcmetr.log had grown to 2GB for some reason and I suppose this is the reason it stopped. I deleted dcmetr.log and restarted the ldm and data started being decoded and I got both my compiled nwx binary and yours to work. Sorry to have wasted your time. Thanks, Robert