pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-69897-001_Colosseum.ps) >>/Users/jc/w/tmp/Tune-69897-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JeanWhite/100_Popular_HRJCD/001_Colosseum.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-69897-001_Colosseum.abc 813 ABC music file with the extracted tune(s)
Tune-69897-001_Colosseum.ps 37260 PostScript
Tune-69897-001_Colosseum.txt 813 Plain-text file with the extracted tune(s)
Tune-69897-get.log 4627 Log file, useful mostly for debugging
These files should be available for 24 hours.