Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book48/JamesJohnson_ScotsMusicalMuseumV4-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4311-JamesJohnson_ScotsMusicalMuseumV4-V1.ps) >>/Users/jc/w/tmp/Tune-4311-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book48/JamesJohnson_ScotsMusicalMuseumV4-V1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_4311.log 276410 Log file, useful mostly for debugging
Tune-4311-JamesJohnson_ScotsMusicalMuseumV4-V1.abc 175 ABC music file with the extracted tune(s)
Tune-4311-JamesJohnson_ScotsMusicalMuseumV4-V1.ps 6 PostScript
Tune-4311-JamesJohnson_ScotsMusicalMuseumV4-V1.txt 175 Plain-text file with the extracted tune(s)
Tune-4311-get.log 4624 Log file, useful mostly for debugging
Tune-43110-get.log 3524 Log file, useful mostly for debugging
Tune-43111-get.log 3528 Log file, useful mostly for debugging
Tune-43113-get.log 9172 Log file, useful mostly for debugging
Tune-43114-get.log 4672 Log file, useful mostly for debugging
Tune-43115-get.log 8264 Log file, useful mostly for debugging
Tune-43116-get.log 5315 Log file, useful mostly for debugging
Tune-43119-get.log 20424 Log file, useful mostly for debugging
These files should be available for 24 hours.