Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/SelectionOfDancesReelsAndWaltzes/24CountryDances_1791_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4754-24CountryDances_1791_Thompson.ps) >>/Users/jc/w/tmp/Tune-4754-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SelectionOfDancesReelsAndWaltzes/24CountryDances_1791_Thompson.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_47541.log 1174641 Log file, useful mostly for debugging
Tune-4754-24CountryDances_1791_Thompson.abc 194 ABC music file with the extracted tune(s)
Tune-4754-24CountryDances_1791_Thompson.ps 6 PostScript
Tune-4754-24CountryDances_1791_Thompson.txt 194 Plain-text file with the extracted tune(s)
Tune-4754-get.log 4631 Log file, useful mostly for debugging
Tune-47540-AMHSI-abc1.abc 163 ABC music file with the extracted tune(s)
Tune-47540-AMHSI-abc1.pdf 2217 Portable Data Format
Tune-47540-AMHSI-abc1.ps 6 PostScript
Tune-47540-AMHSI-abc1.txt 163 Plain-text file with the extracted tune(s)
Tune-47540-get.log 4978 Log file, useful mostly for debugging
Tune-47546-JohnTreat_GftF1.abc 154 ABC music file with the extracted tune(s)
Tune-47546-JohnTreat_GftF1.pdf 2217 Portable Data Format
Tune-47546-JohnTreat_GftF1.ps 6 PostScript
Tune-47546-JohnTreat_GftF1.txt 154 Plain-text file with the extracted tune(s)
Tune-47546-get.log 5037 Log file, useful mostly for debugging
Tune-47547-get.log 3887 Log file, useful mostly for debugging
These files should be available for 24 hours.