Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1779/Urbani_Liston_1800.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6111-Urbani_Liston_1800.ps) >>/Users/jc/w/tmp/Tune-6111-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1779/Urbani_Liston_1800.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-6111-24CountryDances_1809_Cahusac_AK.abc 168 ABC music file with the extracted tune(s)
Tune-6111-24CountryDances_1809_Cahusac_AK.txt 168 Plain-text file with the extracted tune(s)
Tune-6111-Urbani_Liston_1800.abc 155 ABC music file with the extracted tune(s)
Tune-6111-Urbani_Liston_1800.ps 6 PostScript
Tune-6111-Urbani_Liston_1800.txt 155 Plain-text file with the extracted tune(s)
Tune-6111-get.log 7786 Log file, useful mostly for debugging
Tune-61112-Remick.abc 143 ABC music file with the extracted tune(s)
Tune-61112-Remick.ps 6 PostScript
Tune-61112-Remick.txt 143 Plain-text file with the extracted tune(s)
Tune-61112-get.log 3909 Log file, useful mostly for debugging
Tune-61118-get.log 1442 Log file, useful mostly for debugging
Tune-61119-JamesJohnson_ScotsMusicalMuseumV4-V2.abc 179 ABC music file with the extracted tune(s)
Tune-61119-JamesJohnson_ScotsMusicalMuseumV4-V2.ps 6 PostScript
Tune-61119-JamesJohnson_ScotsMusicalMuseumV4-V2.txt 179 Plain-text file with the extracted tune(s)
Tune-61119-get.log 4694 Log file, useful mostly for debugging
These files should be available for 24 hours.