pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2914-CPCvol2-abc1.ps) >>/Users/jc/w/tmp/Tune-2914-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JamesOswald/CPC/CPCvol2/CPCvol2-abc1.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
Coll_2914.log 263379 Log file, useful mostly for debugging
Form_2914.log 850 Log file, useful mostly for debugging
Form_29141.log 932 Log file, useful mostly for debugging
Tune-2914-CPCvol2-abc1.abc 862 ABC music file with the extracted tune(s)
Tune-2914-CPCvol2-abc1.ps 43205 PostScript
Tune-2914-CPCvol2-abc1.txt 862 Plain-text file with the extracted tune(s)
Tune-2914-get.log 4425 Log file, useful mostly for debugging
Tune-29142-get.log 4669 Log file, useful mostly for debugging
Tune-29146-get.log 4370 Log file, useful mostly for debugging
Tune-29149-get.log 6886 Log file, useful mostly for debugging
These files should be available for 24 hours.