pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-77333-20932.ps) >>/Users/jc/w/tmp/Tune-77333-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Hamilton/HUTB2/20932=Suibhal_an_t_Sneachd_Tra_Oiche-V2.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-77333-20932.abc 1048 ABC music file with the extracted tune(s)
Tune-77333-20932.ps 36752 PostScript
Tune-77333-20932.txt 1048 Plain-text file with the extracted tune(s)
Tune-77333-get.log 5580 Log file, useful mostly for debugging
These files should be available for 24 hours.