Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/jpg/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4293-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-4293-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/jpg/JamesJohnson_ScotsMusicalMuseumV4-V2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-4293-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 172 ABC music file with the extracted tune(s)
Tune-4293-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-4293-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-4293-get.log 4608 Log file, useful mostly for debugging
Tune-42930-get.log 4826 Log file, useful mostly for debugging
Tune-42931-get.log 4190 Log file, useful mostly for debugging
Tune-42933-get.log 4656 Log file, useful mostly for debugging
Tune-42936-get.log 4739 Log file, useful mostly for debugging
Tune-42937-get.log 3606 Log file, useful mostly for debugging
These files should be available for 24 hours.