Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Pioneer/1812_Wilson_Harmony_FourNewCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2690-1812_Wilson_Harmony_FourNewCountryDances.ps) >>/Users/jc/w/tmp/Tune-2690-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Pioneer/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
Form_26905.log 875 Log file, useful mostly for debugging
Tune-2690-1812_Wilson_Harmony_FourNewCountryDances.abc 180 ABC music file with the extracted tune(s)
Tune-2690-1812_Wilson_Harmony_FourNewCountryDances.ps 6 PostScript
Tune-2690-1812_Wilson_Harmony_FourNewCountryDances.txt 180 Plain-text file with the extracted tune(s)
Tune-2690-get.log 4712 Log file, useful mostly for debugging
Tune-26901-2289.abc 552 ABC music file with the extracted tune(s)
Tune-26901-2289.pdf 13216 Portable Data Format
Tune-26901-2289.ps 33681 PostScript
Tune-26901-2289.txt 552 Plain-text file with the extracted tune(s)
Tune-26901-get.log 5458 Log file, useful mostly for debugging
These files should be available for 24 hours.