Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book15/24CountryDances_1792_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4878-24CountryDances_1792_Thompson.ps) >>/Users/jc/w/tmp/Tune-4878-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book15/24CountryDances_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_48787.log 433212 Log file, useful mostly for debugging
Tune-4878-24CountryDances_1792_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-4878-24CountryDances_1792_Thompson.ps 6 PostScript
Tune-4878-24CountryDances_1792_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-4878-get.log 4473 Log file, useful mostly for debugging
Tune-48781-get.log 3672 Log file, useful mostly for debugging
Tune-48782-get.log 5857 Log file, useful mostly for debugging
Tune-48783-get.log 3658 Log file, useful mostly for debugging
Tune-48784-get.log 8926 Log file, useful mostly for debugging
Tune-48785-get.log 4083 Log file, useful mostly for debugging
Tune-48786-get.log 5128 Log file, useful mostly for debugging
Tune-48788-get.log 4822 Log file, useful mostly for debugging
Tune-48789-get.log 4388 Log file, useful mostly for debugging
These files should be available for 24 hours.