pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5282-NewPetronella.ps) >>/Users/jc/w/tmp/Tune-5282-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/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_52820.log 30 Log file, useful mostly for debugging
Form_52827.log 869 Log file, useful mostly for debugging
Tune-5282-NewPetronella.abc 0 ABC music file with the extracted tune(s)
Tune-5282-NewPetronella.ps 0 PostScript
Tune-5282-NewPetronella.txt 0 Plain-text file with the extracted tune(s)
Tune-5282-get.log 0 Log file, useful mostly for debugging
Tune-52823-get.log 5018 Log file, useful mostly for debugging
Tune-52824-get.log 5443 Log file, useful mostly for debugging
Tune-52825-get.log 67908 Log file, useful mostly for debugging
These files should be available for 24 hours.