pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-39724-reels.ps) >>/Users/jc/w/tmp/Tune-39724-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/rigel.csuchico.edu/reels.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_39724.log 145832 Log file, useful mostly for debugging
Tune-39724-get.log 0 Log file, useful mostly for debugging
Tune-39724-reels.abc 0 ABC music file with the extracted tune(s)
Tune-39724-reels.ps 0 PostScript
These files should be available for 24 hours.