pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-50397-NewPetronella.ps) >>/Users/jc/w/tmp/Tune-50397-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/program/NewPetronella.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
Form_50397.log 744 Log file, useful mostly for debugging
Tune-50397-NewPetronella.abc 2284 ABC music file with the extracted tune(s)
Tune-50397-NewPetronella.ps 49499 PostScript
Tune-50397-NewPetronella.txt 2284 Plain-text file with the extracted tune(s)
Tune-50397-get.log 5299 Log file, useful mostly for debugging
These files should be available for 24 hours.