pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-75496-Book4.ps) >>/Users/jc/w/tmp/Tune-75496-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/archive.org/stream/TheMicrophonesRambles/Book4.abc.txt:/%50:Honeymoon.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-75496-Book4.abc 767 ABC music file with the extracted tune(s)
Tune-75496-Book4.ps 39863 PostScript
Tune-75496-Book4.txt 767 Plain-text file with the extracted tune(s)
Tune-75496-get.log 5041 Log file, useful mostly for debugging
These files should be available for 24 hours.