Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc1/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12335-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-12335-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc1/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-12335-2269_the_Pig_Town-001.svg 14688 Scalable Vector Graphics format
Tune-12335-2269_the_Pig_Town.abc 431 ABC music file with the extracted tune(s)
Tune-12335-2269_the_Pig_Town.txt 431 Plain-text file with the extracted tune(s)
Tune-12335-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 173 ABC music file with the extracted tune(s)
Tune-12335-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-12335-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 173 Plain-text file with the extracted tune(s)
Tune-12335-get.log 17079 Log file, useful mostly for debugging
These files should be available for 24 hours.