Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc2/24CountryDances_1771_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-500-24CountryDances_1771_Thompson.ps) >>/Users/jc/w/tmp/Tune-500-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc2/24CountryDances_1771_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
Coll_50076.log 1139084 Log file, useful mostly for debugging
Coll_50087.log 1137684 Log file, useful mostly for debugging
Tune-500-24CountryDances_1771_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-500-24CountryDances_1771_Thompson.ps 6 PostScript
Tune-500-24CountryDances_1771_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-500-get.log 4446 Log file, useful mostly for debugging
Tune-50022-get.log 84227 Log file, useful mostly for debugging
Tune-50072-get.log 1408 Log file, useful mostly for debugging
Tune-50076-get.log 1342 Log file, useful mostly for debugging
Tune-50085-get.log 1400 Log file, useful mostly for debugging
Tune-50091-get.log 1389 Log file, useful mostly for debugging
Tune-50097-get.log 1391 Log file, useful mostly for debugging
Tune-50098-get.log 83904 Log file, useful mostly for debugging
These files should be available for 24 hours.