Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1818/24CountryDances_1810_Button_Whitaker_Elegant.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8880-24CountryDances_1810_Button_Whitaker_Elegant.ps) >>/Users/jc/w/tmp/Tune-8880-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1818/24CountryDances_1810_Button_Whitaker_Elegant.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-8880-24CountryDances_1810_Button_Whitaker_Elegant.abc 181 ABC music file with the extracted tune(s)
Tune-8880-24CountryDances_1810_Button_Whitaker_Elegant.ps 6 PostScript
Tune-8880-24CountryDances_1810_Button_Whitaker_Elegant.txt 181 Plain-text file with the extracted tune(s)
Tune-8880-get.log 4782 Log file, useful mostly for debugging
Tune-88804-24CountryDances_1808_Goulding_PD.abc 169 ABC music file with the extracted tune(s)
Tune-88804-24CountryDances_1808_Goulding_PD.pdf 2217 Portable Data Format
Tune-88804-24CountryDances_1808_Goulding_PD.ps 6 PostScript
Tune-88804-24CountryDances_1808_Goulding_PD.txt 169 Plain-text file with the extracted tune(s)
Tune-88804-get.log 5518 Log file, useful mostly for debugging
Tune-88807-MichaelDabney_12Minuets12Dances-1760-V1.abc 176 ABC music file with the extracted tune(s)
Tune-88807-MichaelDabney_12Minuets12Dances-1760-V1.txt 176 Plain-text file with the extracted tune(s)
Tune-88807-get.log 3704 Log file, useful mostly for debugging
These files should be available for 24 hours.