Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1803/JamesJohnson_ScotsMusicalMuseumV4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9427-JamesJohnson_ScotsMusicalMuseumV4-V2.ps) >>/Users/jc/w/tmp/Tune-9427-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1803/JamesJohnson_ScotsMusicalMuseumV4-V2.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-9427-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 173 ABC music file with the extracted tune(s)
Tune-9427-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-9427-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 173 Plain-text file with the extracted tune(s)
Tune-9427-get.log 4610 Log file, useful mostly for debugging
Tune-94270-Stewart_SCAJMR_1784-V1.abc 159 ABC music file with the extracted tune(s)
Tune-94270-Stewart_SCAJMR_1784-V1.ps 6 PostScript
Tune-94270-Stewart_SCAJMR_1784-V1.txt 159 Plain-text file with the extracted tune(s)
Tune-94270-get.log 4245 Log file, useful mostly for debugging
Tune-94271-24CountryDances_1776_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-94271-24CountryDances_1776_Thompson.ps 6 PostScript
Tune-94271-24CountryDances_1776_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-94271-get.log 4392 Log file, useful mostly for debugging
These files should be available for 24 hours.