Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book20/24CountryDances_1792_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1339-24CountryDances_1792_Thompson.ps) >>/Users/jc/w/tmp/Tune-1339-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book20/24CountryDances_1792_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_13397.log 559212 Log file, useful mostly for debugging
Tune-1339-24CountryDances_1792_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-1339-24CountryDances_1792_Thompson.ps 6 PostScript
Tune-1339-24CountryDances_1792_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-1339-get.log 4475 Log file, useful mostly for debugging
Tune-13391-get.log 5652 Log file, useful mostly for debugging
Tune-13392-get.log 3652 Log file, useful mostly for debugging
Tune-13393-get.log 4770 Log file, useful mostly for debugging
Tune-13395-get.log 10514 Log file, useful mostly for debugging
Tune-13397-get.log 3881 Log file, useful mostly for debugging
Tune-13398-get.log 5240 Log file, useful mostly for debugging
Tune-13399-get.log 5029 Log file, useful mostly for debugging
These files should be available for 24 hours.