Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book15/24CountryDances_1772_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2057-24CountryDances_1772_Thompson.ps) >>/Users/jc/w/tmp/Tune-2057-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book15/24CountryDances_1772_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_20573.log 345778 Log file, useful mostly for debugging
Form_20577.log 881 Log file, useful mostly for debugging
Tune-2057-24CountryDances_1772_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-2057-24CountryDances_1772_Thompson.ps 6 PostScript
Tune-2057-24CountryDances_1772_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-2057-get.log 4473 Log file, useful mostly for debugging
Tune-20570-24CountryDances_1748_TDavis.abc 166 ABC music file with the extracted tune(s)
Tune-20570-24CountryDances_1748_TDavis.txt 166 Plain-text file with the extracted tune(s)
Tune-20570-get.log 10920 Log file, useful mostly for debugging
Tune-20571-get.log 7755 Log file, useful mostly for debugging
Tune-20572-get.log 4394 Log file, useful mostly for debugging
Tune-20575-get.log 4281 Log file, useful mostly for debugging
Tune-20576-get.log 4464 Log file, useful mostly for debugging
Tune-20578-get.log 4581 Log file, useful mostly for debugging
These files should be available for 24 hours.