Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/mazurka/24CountryDances_1802_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2129-24CountryDances_1802_Thompson.ps) >>/Users/jc/w/tmp/Tune-2129-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/mazurka/24CountryDances_1802_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_21291.log 465410 Log file, useful mostly for debugging
Coll_21292.log 458410 Log file, useful mostly for debugging
Coll_21298.log 461211 Log file, useful mostly for debugging
Coll_21299.log 736220 Log file, useful mostly for debugging
Form_21291.log 825 Log file, useful mostly for debugging
Tune-2129-24CountryDances_1802_Thompson.abc 169 ABC music file with the extracted tune(s)
Tune-2129-24CountryDances_1802_Thompson.ps 6 PostScript
Tune-2129-24CountryDances_1802_Thompson.txt 169 Plain-text file with the extracted tune(s)
Tune-2129-get.log 4483 Log file, useful mostly for debugging
Tune-21296-get.log 6338 Log file, useful mostly for debugging
Tune-21297-get.log 6945 Log file, useful mostly for debugging
These files should be available for 24 hours.