Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/12Minuets12Dances/24CountryDances_1770_Longman.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6756-24CountryDances_1770_Longman.ps) >>/Users/jc/w/tmp/Tune-6756-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/12Minuets12Dances/24CountryDances_1770_Longman.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_67560.log 264661 Log file, useful mostly for debugging
Coll_67566.log 268876 Log file, useful mostly for debugging
Coll_67567.log 261851 Log file, useful mostly for debugging
Coll_67568.log 266066 Log file, useful mostly for debugging
Tune-6756-24CountryDances_1770_Longman.abc 178 ABC music file with the extracted tune(s)
Tune-6756-24CountryDances_1770_Longman.ps 6 PostScript
Tune-6756-24CountryDances_1770_Longman.txt 178 Plain-text file with the extracted tune(s)
Tune-6756-get.log 4520 Log file, useful mostly for debugging
Tune-67563-get.log 4155 Log file, useful mostly for debugging
Tune-67565-get.log 54815 Log file, useful mostly for debugging
Tune-67569-get.log 4226 Log file, useful mostly for debugging
These files should be available for 24 hours.