Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM2/JamesJohnson_ScotsMusicalMuseumV5-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3346-JamesJohnson_ScotsMusicalMuseumV5-V2.ps) >>/Users/jc/w/tmp/Tune-3346-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM2/JamesJohnson_ScotsMusicalMuseumV5-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-3346-JamesJohnson_ScotsMusicalMuseumV5-V2.abc 172 ABC music file with the extracted tune(s)
Tune-3346-JamesJohnson_ScotsMusicalMuseumV5-V2.ps 6 PostScript
Tune-3346-JamesJohnson_ScotsMusicalMuseumV5-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-3346-LastNewRigaudonThe_PLFD1695_330.abc 404 ABC music file with the extracted tune(s)
Tune-3346-LastNewRigaudonThe_PLFD1695_330.ps 33957 PostScript
Tune-3346-LastNewRigaudonThe_PLFD1695_330.txt 404 Plain-text file with the extracted tune(s)
Tune-3346-get.log 9638 Log file, useful mostly for debugging
Tune-33465-get.log 5603 Log file, useful mostly for debugging
These files should be available for 24 hours.