pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9646-038_Irish_Air.ps) >>/Users/jc/w/tmp/Tune-9646-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/HibernianMuse/038_Irish_Air.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
Form_96463.log 889 Log file, useful mostly for debugging
Tune-9646-038_Irish_Air.abc 800 ABC music file with the extracted tune(s)
Tune-9646-038_Irish_Air.ps 36052 PostScript
Tune-9646-038_Irish_Air.txt 800 Plain-text file with the extracted tune(s)
Tune-9646-get.log 4796 Log file, useful mostly for debugging
These files should be available for 24 hours.