pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-33016-Book1.ps) >>/Users/jc/w/tmp/Tune-33016-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/archive.org/stream/TheMicrophonesRambles/Book1.abc.txt:/%13:Ceilidh_House_Polka_1.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
Tune-33016-Book1.abc 444 ABC music file with the extracted tune(s)
Tune-33016-Book1.ps 33558 PostScript
Tune-33016-Book1.txt 444 Plain-text file with the extracted tune(s)
Tune-33016-get.log 9314 Log file, useful mostly for debugging
These files should be available for 24 hours.