Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/misc/MichaelDabney_12Minuets12Dances-1760-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-680-MichaelDabney_12Minuets12Dances-1760-V1.ps) >>/Users/jc/w/tmp/Tune-680-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/misc/MichaelDabney_12Minuets12Dances-1760-V1.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-680-MichaelDabney_12Minuets12Dances-1760-V1.abc 176 ABC music file with the extracted tune(s)
Tune-680-MichaelDabney_12Minuets12Dances-1760-V1.ps 6 PostScript
Tune-680-MichaelDabney_12Minuets12Dances-1760-V1.txt 176 Plain-text file with the extracted tune(s)
Tune-680-get.log 4656 Log file, useful mostly for debugging
Tune-68002-24CountryDances_1808_Goulding_FTM.abc 170 ABC music file with the extracted tune(s)
Tune-68002-24CountryDances_1808_Goulding_FTM.ps 6 PostScript
Tune-68002-24CountryDances_1808_Goulding_FTM.txt 170 Plain-text file with the extracted tune(s)
Tune-68002-get.log 4599 Log file, useful mostly for debugging
Tune-6803-24CountryDances_1809_Button_Whitaker.abc 173 ABC music file with the extracted tune(s)
Tune-6803-24CountryDances_1809_Button_Whitaker.ps 6 PostScript
Tune-6803-24CountryDances_1809_Button_Whitaker.txt 173 Plain-text file with the extracted tune(s)
Tune-6803-get.log 8190 Log file, useful mostly for debugging
Tune-68052-Rutherford_Compleat_Collection_V1.abc 170 ABC music file with the extracted tune(s)
Tune-68052-Rutherford_Compleat_Collection_V1.txt 170 Plain-text file with the extracted tune(s)
Tune-68052-get.log 3602 Log file, useful mostly for debugging
Tune-68065-24CountryDances_1803_Gray_Thompson.abc 171 ABC music file with the extracted tune(s)
Tune-68065-24CountryDances_1803_Gray_Thompson.ps 6 PostScript
Tune-68065-24CountryDances_1803_Gray_Thompson.txt 171 Plain-text file with the extracted tune(s)
Tune-68065-get.log 4620 Log file, useful mostly for debugging
Tune-68073-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-68073-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-68073-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-68073-get.log 4641 Log file, useful mostly for debugging
These files should be available for 24 hours.