pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-75456-KirrieKebbuckS.ps) >>/Users/jc/w/tmp/Tune-75456-get.log 2>&1" returned status 256
http://terrytraub.org/abc/KirrieKebbuckS.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-75456-KirrieKebbuckS.abc 467 ABC music file with the extracted tune(s)
Tune-75456-KirrieKebbuckS.ps 37253 PostScript
Tune-75456-KirrieKebbuckS.txt 467 Plain-text file with the extracted tune(s)
Tune-75456-get.log 4261 Log file, useful mostly for debugging
These files should be available for 24 hours.