Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM2/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4199-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-4199-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM2/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-4199-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 172 ABC music file with the extracted tune(s)
Tune-4199-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-4199-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-4199-get.log 14229 Log file, useful mostly for debugging
Tune-41990-get.log 8815 Log file, useful mostly for debugging
Tune-41991-get.log 4569 Log file, useful mostly for debugging
Tune-41992-get.log 3368 Log file, useful mostly for debugging
Tune-41993-get.log 13427 Log file, useful mostly for debugging
Tune-41994-get.log 3726 Log file, useful mostly for debugging
Tune-41995-get.log 3888 Log file, useful mostly for debugging
Tune-41996-get.log 18275 Log file, useful mostly for debugging
Tune-41998-get.log 10921 Log file, useful mostly for debugging
These files should be available for 24 hours.