Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Scotia/24CountryDances_1809_Button_Whitaker.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4922-24CountryDances_1809_Button_Whitaker.ps) >>/Users/jc/w/tmp/Tune-4922-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Scotia/24CountryDances_1809_Button_Whitaker.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-4922-24CountryDances_1809_Button_Whitaker.abc 175 ABC music file with the extracted tune(s)
Tune-4922-24CountryDances_1809_Button_Whitaker.ps 6 PostScript
Tune-4922-24CountryDances_1809_Button_Whitaker.txt 175 Plain-text file with the extracted tune(s)
Tune-4922-get.log 23143 Log file, useful mostly for debugging
Tune-49220-get.log 9723 Log file, useful mostly for debugging
Tune-49221-get.log 4890 Log file, useful mostly for debugging
Tune-49222-get.log 4471 Log file, useful mostly for debugging
Tune-49223-get.log 9714 Log file, useful mostly for debugging
Tune-49224-get.log 8523 Log file, useful mostly for debugging
Tune-49225-get.log 13500 Log file, useful mostly for debugging
Tune-49226-get.log 14119 Log file, useful mostly for debugging
Tune-49228-get.log 4371 Log file, useful mostly for debugging
These files should be available for 24 hours.