pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35957-03.ps) >>/Users/jc/w/tmp/Tune-35957-get.log 2>&1" returned status 256
http://www.nigelgatherer.com/tunes/abc/petrie2/03.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-35957-03.abc 523 ABC music file with the extracted tune(s)
Tune-35957-03.ps 37142 PostScript
Tune-35957-03.txt 523 Plain-text file with the extracted tune(s)
Tune-35957-get.log 4239 Log file, useful mostly for debugging
These files should be available for 24 hours.