pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1683-JockeysDance.ps) >>/Users/jc/w/tmp/Tune-1683-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/jig/JockeysDance.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
Coll_16834.log 144622 Log file, useful mostly for debugging
Form_1683.log 829 Log file, useful mostly for debugging
Form_16837.log 843 Log file, useful mostly for debugging
Tune-1683-JockeysDance.abc 604 ABC music file with the extracted tune(s)
Tune-1683-JockeysDance.ps 35778 PostScript
Tune-1683-JockeysDance.txt 604 Plain-text file with the extracted tune(s)
Tune-1683-get.log 4775 Log file, useful mostly for debugging
These files should be available for 24 hours.