Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/MCCD/24CountryDances_1771_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6792-24CountryDances_1771_Thompson.ps) >>/Users/jc/w/tmp/Tune-6792-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MCCD/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_67920.log 245884 Log file, useful mostly for debugging
Form_67922.log 926 Log file, useful mostly for debugging
Tune-6792-24CountryDances_1771_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-6792-24CountryDances_1771_Thompson.ps 6 PostScript
Tune-6792-24CountryDances_1771_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-6792-get.log 4465 Log file, useful mostly for debugging
Tune-67928-get.log 1363 Log file, useful mostly for debugging
Tune-67929-get.log 4071 Log file, useful mostly for debugging
These files should be available for 24 hours.