Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book24/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4717-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-4717-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book24/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_47174.log 284809 Log file, useful mostly for debugging
Tune-4717-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 175 ABC music file with the extracted tune(s)
Tune-4717-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-4717-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-4717-get.log 4624 Log file, useful mostly for debugging
Tune-47171-get.log 8597 Log file, useful mostly for debugging
Tune-47172-get.log 4076 Log file, useful mostly for debugging
Tune-47173-get.log 8099 Log file, useful mostly for debugging
Tune-47174-get.log 19374 Log file, useful mostly for debugging
Tune-47175-get.log 3947 Log file, useful mostly for debugging
Tune-47176-get.log 16581 Log file, useful mostly for debugging
Tune-47179-get.log 4951 Log file, useful mostly for debugging
These files should be available for 24 hours.