Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1759/1812_Wilson_Harmony_FourNewCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35305-1812_Wilson_Harmony_FourNewCountryDances.ps) >>/Users/jc/w/tmp/Tune-35305-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1759/1812_Wilson_Harmony_FourNewCountryDances.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-35305-1812_Wilson_Harmony_FourNewCountryDances.abc 177 ABC music file with the extracted tune(s)
Tune-35305-1812_Wilson_Harmony_FourNewCountryDances.ps 6 PostScript
Tune-35305-1812_Wilson_Harmony_FourNewCountryDances.txt 177 Plain-text file with the extracted tune(s)
Tune-35305-CockleShells_PLFD1701_428.abc 533 ABC music file with the extracted tune(s)
Tune-35305-CockleShells_PLFD1701_428.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-35305-CockleShells_PLFD1701_428.ps 33858 PostScript
Tune-35305-CockleShells_PLFD1701_428.txt 533 Plain-text file with the extracted tune(s)
Tune-35305-get.log 11652 Log file, useful mostly for debugging
These files should be available for 24 hours.