Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/gavving-bin/Kerr_MM2-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3666-Kerr_MM2-V2.ps) >>/Users/jc/w/tmp/Tune-3666-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/gavving-bin/Kerr_MM2-V2.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-3666-Kerr_MM2-V2.abc 155 ABC music file with the extracted tune(s)
Tune-3666-Kerr_MM2-V2.ps 6 PostScript
Tune-3666-Kerr_MM2-V2.txt 155 Plain-text file with the extracted tune(s)
Tune-3666-get.log 4127 Log file, useful mostly for debugging
Tune-36662-Pat_ShawsPinewoods.abc 152 ABC music file with the extracted tune(s)
Tune-36662-Pat_ShawsPinewoods.ps 6 PostScript
Tune-36662-Pat_ShawsPinewoods.txt 152 Plain-text file with the extracted tune(s)
Tune-36662-get.log 4139 Log file, useful mostly for debugging
Tune-36666-24CountryDances_1779_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-36666-24CountryDances_1779_Thompson.pdf 2217 Portable Data Format
Tune-36666-24CountryDances_1779_Thompson.ps 6 PostScript
Tune-36666-24CountryDances_1779_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-36666-get.log 5443 Log file, useful mostly for debugging
These files should be available for 24 hours.