Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/_/24CountryDances_1765_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6795-24CountryDances_1765_Thompson.ps) >>/Users/jc/w/tmp/Tune-6795-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/_/24CountryDances_1765_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_6795.log 291355 Log file, useful mostly for debugging
Coll_67951.log 270280 Log file, useful mostly for debugging
Coll_67956.log 288545 Log file, useful mostly for debugging
Coll_67958.log 288545 Log file, useful mostly for debugging
Coll_67959.log 285735 Log file, useful mostly for debugging
Tune-6795-24CountryDances_1765_Thompson.abc 163 ABC music file with the extracted tune(s)
Tune-6795-24CountryDances_1765_Thompson.ps 6 PostScript
Tune-6795-24CountryDances_1765_Thompson.txt 163 Plain-text file with the extracted tune(s)
Tune-6795-get.log 4443 Log file, useful mostly for debugging
Tune-67950-get.log 11236 Log file, useful mostly for debugging
These files should be available for 24 hours.