pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6043-GoldenBookOfFavoriteSongs2.ps) >>/Users/jc/w/tmp/Tune-6043-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/GoldenBookOfFavoriteSongs/GoldenBookOfFavoriteSongs2.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-6043-GoldenBookOfFavoriteSongs2.abc 41079 ABC music file with the extracted tune(s)
Tune-6043-GoldenBookOfFavoriteSongs2.ps 250091 PostScript
Tune-6043-GoldenBookOfFavoriteSongs2.txt 41079 Plain-text file with the extracted tune(s)
Tune-6043-get.log 24248 Log file, useful mostly for debugging
Tune-60436-CDSS_CDoT.abc 163 ABC music file with the extracted tune(s)
Tune-60436-CDSS_CDoT.ps 6 PostScript
Tune-60436-CDSS_CDoT.txt 163 Plain-text file with the extracted tune(s)
Tune-60436-get.log 4074 Log file, useful mostly for debugging
These files should be available for 24 hours.