Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book23/24CountryDances_1810_Button_Whitaker.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4443-24CountryDances_1810_Button_Whitaker.ps) >>/Users/jc/w/tmp/Tune-4443-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book23/24CountryDances_1810_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-4443-24CountryDances_1810_Button_Whitaker.abc 175 ABC music file with the extracted tune(s)
Tune-4443-24CountryDances_1810_Button_Whitaker.ps 6 PostScript
Tune-4443-24CountryDances_1810_Button_Whitaker.txt 175 Plain-text file with the extracted tune(s)
Tune-4443-get.log 4624 Log file, useful mostly for debugging
Tune-44430-get.log 13071 Log file, useful mostly for debugging
Tune-44431-get.log 9370 Log file, useful mostly for debugging
Tune-44433-get.log 3150 Log file, useful mostly for debugging
Tune-44434-get.log 9507 Log file, useful mostly for debugging
Tune-44435-get.log 19103 Log file, useful mostly for debugging
Tune-44436-get.log 3096 Log file, useful mostly for debugging
Tune-44438-get.log 4504 Log file, useful mostly for debugging
These files should be available for 24 hours.