pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1333-NellieWemyssR.ps) >>/Users/jc/w/tmp/Tune-1333-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/KC/reel/NellieWemyssR.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Form_13331.log 743 Log file, useful mostly for debugging
Form_13337.log 862 Log file, useful mostly for debugging
Form_13338.log 838 Log file, useful mostly for debugging
Tune-1333-NellieWemyssR.abc 386 ABC music file with the extracted tune(s)
Tune-1333-NellieWemyssR.ps 34791 PostScript
Tune-1333-NellieWemyssR.txt 386 Plain-text file with the extracted tune(s)
Tune-1333-get.log 4484 Log file, useful mostly for debugging
Tune-13330-get.log 3881 Log file, useful mostly for debugging
These files should be available for 24 hours.