pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1183-v3tune.ps) >>/Users/jc/w/tmp/Tune-1183-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP1/v3tune.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_11833.log 1465968 Log file, useful mostly for debugging
Coll_11834.log 263810 Log file, useful mostly for debugging
Coll_11835.log 164373 Log file, useful mostly for debugging
Form_11838.log 970 Log file, useful mostly for debugging
Tune-1183-get.log 4904 Log file, useful mostly for debugging
Tune-1183-v3tune.abc 569 ABC music file with the extracted tune(s)
Tune-1183-v3tune.ps 30879 PostScript
Tune-1183-v3tune.txt 569 Plain-text file with the extracted tune(s)
Tune-11830-get.log 3500 Log file, useful mostly for debugging
Tune-11836-get.log 7673 Log file, useful mostly for debugging
Tune-11837-get.log 5555 Log file, useful mostly for debugging
These files should be available for 24 hours.