Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book48/JamesJohnson_ScotsMusicalMuseumV5-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3372-JamesJohnson_ScotsMusicalMuseumV5-V1.ps) >>/Users/jc/w/tmp/Tune-3372-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book48/JamesJohnson_ScotsMusicalMuseumV5-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-3372-JamesJohnson_ScotsMusicalMuseumV5-V1.abc 175 ABC music file with the extracted tune(s)
Tune-3372-JamesJohnson_ScotsMusicalMuseumV5-V1.ps 6 PostScript
Tune-3372-JamesJohnson_ScotsMusicalMuseumV5-V1.txt 175 Plain-text file with the extracted tune(s)
Tune-3372-get.log 4622 Log file, useful mostly for debugging
Tune-33723-24CountryDances_1798_Bland_Weller.abc 167 ABC music file with the extracted tune(s)
Tune-33723-24CountryDances_1798_Bland_Weller.ps 6 PostScript
Tune-33723-24CountryDances_1798_Bland_Weller.txt 167 Plain-text file with the extracted tune(s)
Tune-33723-get.log 4579 Log file, useful mostly for debugging
Tune-33729-24CountryDances_1798_Preston.abc 167 ABC music file with the extracted tune(s)
Tune-33729-24CountryDances_1798_Preston.txt 167 Plain-text file with the extracted tune(s)
Tune-33729-get.log 3522 Log file, useful mostly for debugging
These files should be available for 24 hours.