pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22202-Tune54600.ps) >>/Users/jc/w/tmp/Tune-22202-get.log 2>&1" returned status 256
http://www.gulfweb.net/rlwalker/abc/Tune54600.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-22202-Tune54600.abc 732 ABC music file with the extracted tune(s)
Tune-22202-Tune54600.ps 39825 PostScript
Tune-22202-Tune54600.txt 732 Plain-text file with the extracted tune(s)
Tune-22202-get.log 52308 Log file, useful mostly for debugging
These files should be available for 24 hours.