Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book29/JamesJohnson_ScotsMusicalMuseumV5-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2047-JamesJohnson_ScotsMusicalMuseumV5-V1.ps) >>/Users/jc/w/tmp/Tune-2047-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book29/JamesJohnson_ScotsMusicalMuseumV5-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_20472.log 676812 Log file, useful mostly for debugging
Coll_20478.log 149967 Log file, useful mostly for debugging
Tune-2047-JamesJohnson_ScotsMusicalMuseumV5-V1.abc 175 ABC music file with the extracted tune(s)
Tune-2047-JamesJohnson_ScotsMusicalMuseumV5-V1.ps 6 PostScript
Tune-2047-JamesJohnson_ScotsMusicalMuseumV5-V1.txt 175 Plain-text file with the extracted tune(s)
Tune-2047-get.log 17349 Log file, useful mostly for debugging
Tune-20471-get.log 4444 Log file, useful mostly for debugging
Tune-20472-get.log 1400 Log file, useful mostly for debugging
Tune-20473-get.log 13079 Log file, useful mostly for debugging
Tune-20476-get.log 13787 Log file, useful mostly for debugging
Tune-20477-get.log 4006 Log file, useful mostly for debugging
Tune-20479-get.log 3456 Log file, useful mostly for debugging
These files should be available for 24 hours.