pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8230-bagpipe.ps) >>/Users/jc/w/tmp/Tune-8230-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/src/jcabc2ps-201511002/abc/bagpipe.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-8230-bagpipe.abc 702 ABC music file with the extracted tune(s)
Tune-8230-bagpipe.ps 40453 PostScript
Tune-8230-bagpipe.txt 702 Plain-text file with the extracted tune(s)
Tune-8230-get.log 5093 Log file, useful mostly for debugging
Tune-82301-get.log 1590 Log file, useful mostly for debugging
These files should be available for 24 hours.