Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book16/24CountryDances_1778_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6987-24CountryDances_1778_Thompson.ps) >>/Users/jc/w/tmp/Tune-6987-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book16/24CountryDances_1778_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
Form_6987.log 873 Log file, useful mostly for debugging
Tune-6987-24CountryDances_1778_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-6987-24CountryDances_1778_Thompson.ps 6 PostScript
Tune-6987-24CountryDances_1778_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-6987-get.log 17873 Log file, useful mostly for debugging
Tune-69870-get.log 4895 Log file, useful mostly for debugging
Tune-69871-get.log 3736 Log file, useful mostly for debugging
Tune-69872-get.log 4996 Log file, useful mostly for debugging
Tune-69875-get.log 3860 Log file, useful mostly for debugging
Tune-69876-24CountryDances_1780_Thompson.abc 167 ABC music file with the extracted tune(s)
Tune-69876-24CountryDances_1780_Thompson.ps 6 PostScript
Tune-69876-24CountryDances_1780_Thompson.txt 167 Plain-text file with the extracted tune(s)
Tune-69876-get.log 12395 Log file, useful mostly for debugging
Tune-69877-get.log 11116 Log file, useful mostly for debugging
Tune-69878-get.log 9895 Log file, useful mostly for debugging
Tune-69879-get.log 3598 Log file, useful mostly for debugging
These files should be available for 24 hours.