pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68068-10231_.ps) >>/Users/jc/w/tmp/Tune-68068-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP1/10231_.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_68068.log 1823 Log file, useful mostly for debugging
Tune-68068-10231_.abc 33 ABC music file with the extracted tune(s)
Tune-68068-10231_.ps 6 PostScript
Tune-68068-10231_.txt 33 Plain-text file with the extracted tune(s)
Tune-68068-get.log 3946 Log file, useful mostly for debugging
These files should be available for 24 hours.