pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-14718-Lockhings_Whim.ps) >>/Users/jc/w/tmp/Tune-14718-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/GM/Lockhings_Whim.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_14718.log 289010 Log file, useful mostly for debugging
Tune-14718-Lockhings_Whim.abc 1053 ABC music file with the extracted tune(s)
Tune-14718-Lockhings_Whim.ps 34392 PostScript
Tune-14718-Lockhings_Whim.txt 1053 Plain-text file with the extracted tune(s)
Tune-14718-get.log 4916 Log file, useful mostly for debugging
These files should be available for 24 hours.