Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book37/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2281-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-2281-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book37/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-2281-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 175 ABC music file with the extracted tune(s)
Tune-2281-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-2281-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-2281-get.log 4624 Log file, useful mostly for debugging
Tune-22811-JohnTreat_GftF2.abc 158 ABC music file with the extracted tune(s)
Tune-22811-JohnTreat_GftF2.ps 6 PostScript
Tune-22811-JohnTreat_GftF2.txt 158 Plain-text file with the extracted tune(s)
Tune-22811-get.log 7860 Log file, useful mostly for debugging
Tune-22814-get.log 5545 Log file, useful mostly for debugging
Tune-22815-get.log 8879 Log file, useful mostly for debugging
Tune-22816-get.log 217026 Log file, useful mostly for debugging
Tune-22819-get.log 15438 Log file, useful mostly for debugging
These files should be available for 24 hours.