pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2175-Book1.ps) >>/Users/jc/w/tmp/Tune-2175-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/ceolas.org/Book1.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-2175-Book1.abc 521 ABC music file with the extracted tune(s)
Tune-2175-Book1.ps 35477 PostScript
Tune-2175-Book1.txt 521 Plain-text file with the extracted tune(s)
Tune-2175-get.log 20360 Log file, useful mostly for debugging
Tune-21755-get.log 3774 Log file, useful mostly for debugging
Tune-21757-get.log 5973 Log file, useful mostly for debugging
Tune-21758-get.log 1373 Log file, useful mostly for debugging
These files should be available for 24 hours.