pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2575-celtic_tunes.ps) >>/Users/jc/w/tmp/Tune-2575-get.log 2>&1" returned status 256
http://www.gulfweb.net/rlwalker/abc/celtic_tunes.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_25755.log 144017 Log file, useful mostly for debugging
Form_2575.log 820 Log file, useful mostly for debugging
Tune-2575-celtic_tunes.abc 311 ABC music file with the extracted tune(s)
Tune-2575-celtic_tunes.ps 34281 PostScript
Tune-2575-celtic_tunes.txt 311 Plain-text file with the extracted tune(s)
Tune-2575-get.log 4353 Log file, useful mostly for debugging
Tune-25750-get.log 4244 Log file, useful mostly for debugging
Tune-25754-get.log 4417 Log file, useful mostly for debugging
Tune-25759-get.log 4904 Log file, useful mostly for debugging
These files should be available for 24 hours.