Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book33/24CountryDances_1796_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6140-24CountryDances_1796_Preston.ps) >>/Users/jc/w/tmp/Tune-6140-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book33/24CountryDances_1796_Preston.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-6140-24CountryDances_1796_Preston.abc 167 ABC music file with the extracted tune(s)
Tune-6140-24CountryDances_1796_Preston.ps 6 PostScript
Tune-6140-24CountryDances_1796_Preston.txt 167 Plain-text file with the extracted tune(s)
Tune-6140-CDSS_CDoT.abc 145 ABC music file with the extracted tune(s)
Tune-6140-CDSS_CDoT.pdf 2217 Portable Data Format
Tune-6140-CDSS_CDoT.ps 6 PostScript
Tune-6140-CDSS_CDoT.txt 145 Plain-text file with the extracted tune(s)
Tune-6140-get.log 9276 Log file, useful mostly for debugging
Tune-61408-get.log 3382 Log file, useful mostly for debugging
Tune-97981-Tune-61401-Kerr_MM1-V2.abc 174 ABC music file with the extracted tune(s)
Tune-97981-Tune-61401-Kerr_MM1-V2.txt 174 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.