Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1769/24CountryDances_1809_Button_Whitaker.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42039-24CountryDances_1809_Button_Whitaker.ps) >>/Users/jc/w/tmp/Tune-42039-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1769/24CountryDances_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
Form_42039.log 1165 Log file, useful mostly for debugging
Tune-42039-24CountryDances_1809_Button_Whitaker.abc 173 ABC music file with the extracted tune(s)
Tune-42039-24CountryDances_1809_Button_Whitaker.ps 6 PostScript
Tune-42039-24CountryDances_1809_Button_Whitaker.txt 173 Plain-text file with the extracted tune(s)
Tune-42039-KittyBridges_1745_VO.abc 157 ABC music file with the extracted tune(s)
Tune-42039-KittyBridges_1745_VO.ps 6 PostScript
Tune-42039-KittyBridges_1745_VO.txt 157 Plain-text file with the extracted tune(s)
Tune-42039-get.log 8955 Log file, useful mostly for debugging
These files should be available for 24 hours.