Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book10/24CountryDances_1791_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2255-24CountryDances_1791_Thompson.ps) >>/Users/jc/w/tmp/Tune-2255-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book10/24CountryDances_1791_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_22558.log 674011 Log file, useful mostly for debugging
Tune-2255-24CountryDances_1791_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-2255-24CountryDances_1791_Thompson.ps 6 PostScript
Tune-2255-24CountryDances_1791_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-2255-get.log 8063 Log file, useful mostly for debugging
Tune-22550-get.log 4147 Log file, useful mostly for debugging
Tune-22552-get.log 5870 Log file, useful mostly for debugging
Tune-22554-get.log 5346 Log file, useful mostly for debugging
Tune-22555-get.log 7245 Log file, useful mostly for debugging
Tune-22556-get.log 3662 Log file, useful mostly for debugging
Tune-22557-get.log 4698 Log file, useful mostly for debugging
Tune-22558-get.log 4447 Log file, useful mostly for debugging
Tune-22559-get.log 9063 Log file, useful mostly for debugging
These files should be available for 24 hours.