Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1802/CaledonianCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8109-CaledonianCountryDances.ps) >>/Users/jc/w/tmp/Tune-8109-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1802/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-8109-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-8109-CaledonianCountryDances.ps 6 PostScript
Tune-8109-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-8109-get.log 17269 Log file, useful mostly for debugging
Tune-81091-get.log 5626 Log file, useful mostly for debugging
Tune-81093-get.log 7645 Log file, useful mostly for debugging
Tune-81094-get.log 4459 Log file, useful mostly for debugging
Tune-81095-Tune-57152-508_Duplin_House.abc 179 ABC music file with the extracted tune(s)
Tune-81095-Tune-57152-508_Duplin_House.txt 179 Plain-text file with the extracted tune(s)
Tune-81095-get.log 14194 Log file, useful mostly for debugging
Tune-81096-get.log 4979 Log file, useful mostly for debugging
These files should be available for 24 hours.