Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1776/Kerr_MM3-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7626-Kerr_MM3-V1.ps) >>/Users/jc/w/tmp/Tune-7626-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1776/Kerr_MM3-V1.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-7626-Kerr_MM3-V1.abc 148 ABC music file with the extracted tune(s)
Tune-7626-Kerr_MM3-V1.ps 6 PostScript
Tune-7626-Kerr_MM3-V1.txt 148 Plain-text file with the extracted tune(s)
Tune-7626-get.log 4085 Log file, useful mostly for debugging
Tune-76260-get.log 2803 Log file, useful mostly for debugging
Tune-76261-get.log 3238 Log file, useful mostly for debugging
Tune-76264-24AmericanCountryDances_1785_Cantelo.abc 173 ABC music file with the extracted tune(s)
Tune-76264-24AmericanCountryDances_1785_Cantelo.pdf 2217 Portable Data Format
Tune-76264-24AmericanCountryDances_1785_Cantelo.ps 6 PostScript
Tune-76264-24AmericanCountryDances_1785_Cantelo.txt 173 Plain-text file with the extracted tune(s)
Tune-76264-get.log 5638 Log file, useful mostly for debugging
Tune-76268-get.log 3967 Log file, useful mostly for debugging
These files should be available for 24 hours.