pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4646-20451_Miss_Graham_of_Inchbrackie.ps) >>/Users/jc/w/tmp/Tune-4646-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/20451_Miss_Graham_of_Inchbrackie.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_46463.log 451409 Log file, useful mostly for debugging
Coll_46464.log 454209 Log file, useful mostly for debugging
Tune-4646-20451_Miss_Graham_of_Inchbrackie.abc 692 ABC music file with the extracted tune(s)
Tune-4646-20451_Miss_Graham_of_Inchbrackie.ps 37854 PostScript
Tune-4646-20451_Miss_Graham_of_Inchbrackie.txt 692 Plain-text file with the extracted tune(s)
Tune-4646-get.log 4897 Log file, useful mostly for debugging
These files should be available for 24 hours.