Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book29/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4640-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-4640-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book29/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
Coll_4640.log 669812 Log file, useful mostly for debugging
Tune-4640-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 175 ABC music file with the extracted tune(s)
Tune-4640-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-4640-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-4640-get.log 14584 Log file, useful mostly for debugging
Tune-46400-get.log 54905 Log file, useful mostly for debugging
Tune-46402-get.log 10512 Log file, useful mostly for debugging
Tune-46403-get.log 11967 Log file, useful mostly for debugging
Tune-46404-get.log 4009 Log file, useful mostly for debugging
Tune-46405-get.log 3512 Log file, useful mostly for debugging
Tune-46407-get.log 4767 Log file, useful mostly for debugging
Tune-46408-get.log 9712 Log file, useful mostly for debugging
These files should be available for 24 hours.