pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9472-Four_and_Twenty.ps) >>/Users/jc/w/tmp/Tune-9472-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ViolaRuth/Pioneer/reel/Four_and_Twenty.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_9472.log 14786 Log file, useful mostly for debugging
Coll_94725.log 47 Log file, useful mostly for debugging
Coll_94726.log 273249 Log file, useful mostly for debugging
Coll_94727.log 0 Log file, useful mostly for debugging
Form_94722.log 848 Log file, useful mostly for debugging
Form_94728.log 841 Log file, useful mostly for debugging
Tune-9472-Four_and_Twenty.abc 261 ABC music file with the extracted tune(s)
Tune-9472-Four_and_Twenty.ps 33979 PostScript
Tune-9472-Four_and_Twenty.txt 261 Plain-text file with the extracted tune(s)
Tune-9472-get.log 4457 Log file, useful mostly for debugging
Tune-94721-get.log 4199 Log file, useful mostly for debugging
Tune-94721-sets.abc 0 ABC music file with the extracted tune(s)
Tune-94721-sets.ps 6 PostScript
Tune-94721-sets.txt 0 Plain-text file with the extracted tune(s)
Tune-94724-get.log 2444 Log file, useful mostly for debugging
Tune-94727-get.log 5167 Log file, useful mostly for debugging
These files should be available for 24 hours.