pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68845-AGMj03.ps) >>/Users/jc/w/tmp/Tune-68845-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/AG/AGMj03.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-68845-AGMj03.abc 954 ABC music file with the extracted tune(s)
Tune-68845-AGMj03.ps 44716 PostScript
Tune-68845-AGMj03.txt 954 Plain-text file with the extracted tune(s)
Tune-68845-get.log 4190 Log file, useful mostly for debugging
These files should be available for 24 hours.