Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book39/24AmericanCountryDances_1785_Cantelo.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2678-24AmericanCountryDances_1785_Cantelo.ps) >>/Users/jc/w/tmp/Tune-2678-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book39/24AmericanCountryDances_1785_Cantelo.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-2678-24AmericanCountryDances_1785_Cantelo.abc 175 ABC music file with the extracted tune(s)
Tune-2678-24AmericanCountryDances_1785_Cantelo.ps 6 PostScript
Tune-2678-24AmericanCountryDances_1785_Cantelo.txt 175 Plain-text file with the extracted tune(s)
Tune-2678-get.log 4624 Log file, useful mostly for debugging
Tune-26780-get.log 5499 Log file, useful mostly for debugging
Tune-26781-get.log 4287 Log file, useful mostly for debugging
Tune-26784-get.log 13846 Log file, useful mostly for debugging
Tune-26785-get.log 3836 Log file, useful mostly for debugging
Tune-26786-get.log 4531 Log file, useful mostly for debugging
Tune-26787-get.log 7676 Log file, useful mostly for debugging
Tune-26789-get.log 4652 Log file, useful mostly for debugging
These files should be available for 24 hours.