Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1803/CaledonianCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8955-CaledonianCountryDances.ps) >>/Users/jc/w/tmp/Tune-8955-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1803/CaledonianCountryDances.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-8955-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-8955-CaledonianCountryDances.ps 6 PostScript
Tune-8955-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-8955-get.log 4337 Log file, useful mostly for debugging
Tune-89550-get.log 10277 Log file, useful mostly for debugging
Tune-89551-get.log 4609 Log file, useful mostly for debugging
Tune-89552-get.log 3702 Log file, useful mostly for debugging
Tune-89553-get.log 4414 Log file, useful mostly for debugging
Tune-89554-get.log 3538 Log file, useful mostly for debugging
Tune-89556-get.log 4082 Log file, useful mostly for debugging
Tune-89557-get.log 6650 Log file, useful mostly for debugging
These files should be available for 24 hours.