pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2117-Petronella.ps) >>/Users/jc/w/tmp/Tune-2117-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/program/Petronella.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_21171.log 143412 Log file, useful mostly for debugging
Coll_21172.log 267609 Log file, useful mostly for debugging
Tune-2117-Petronella.abc 598 ABC music file with the extracted tune(s)
Tune-2117-Petronella.ps 35675 PostScript
Tune-2117-Petronella.txt 598 Plain-text file with the extracted tune(s)
Tune-2117-get.log 4557 Log file, useful mostly for debugging
Tune-21175-get.log 7592 Log file, useful mostly for debugging
Tune-21178-get.log 3081 Log file, useful mostly for debugging
These files should be available for 24 hours.