Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book25/24CountryDances_1779_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8717-24CountryDances_1779_Thompson.ps) >>/Users/jc/w/tmp/Tune-8717-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book25/24CountryDances_1779_Thompson.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-8717-24CountryDances_1779_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-8717-24CountryDances_1779_Thompson.ps 6 PostScript
Tune-8717-24CountryDances_1779_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-8717-get.log 13510 Log file, useful mostly for debugging
Tune-87173-24CountryDances_1781_Skillern.abc 168 ABC music file with the extracted tune(s)
Tune-87173-24CountryDances_1781_Skillern.ps 6 PostScript
Tune-87173-24CountryDances_1781_Skillern.txt 168 Plain-text file with the extracted tune(s)
Tune-87173-get.log 9062 Log file, useful mostly for debugging
Tune-87175-get.log 4512 Log file, useful mostly for debugging
Tune-87176-get.log 14007 Log file, useful mostly for debugging
Tune-87177-get.log 9327 Log file, useful mostly for debugging
Tune-87179-get.log 5457 Log file, useful mostly for debugging
These files should be available for 24 hours.