Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Stewart/Riddell/tmp/Tune-68149-24CountryDances_1778_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4927-Tune-68149-24CountryDances_1778_Thompson.ps) >>/Users/jc/w/tmp/Tune-4927-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Stewart/Riddell/tmp/Tune-68149-24CountryDances_1778_Thompson.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-4927-Tune-68149-24CountryDances_1778_Thompson.abc 192 ABC music file with the extracted tune(s)
Tune-4927-Tune-68149-24CountryDances_1778_Thompson.ps 6 PostScript
Tune-4927-Tune-68149-24CountryDances_1778_Thompson.txt 192 Plain-text file with the extracted tune(s)
Tune-4927-get.log 4786 Log file, useful mostly for debugging
Tune-49270-get.log 5871 Log file, useful mostly for debugging
Tune-49271-get.log 21112 Log file, useful mostly for debugging
Tune-49272-get.log 4410 Log file, useful mostly for debugging
Tune-49273-get.log 4477 Log file, useful mostly for debugging
Tune-49276-get.log 9944 Log file, useful mostly for debugging
Tune-49278-get.log 14016 Log file, useful mostly for debugging
These files should be available for 24 hours.