Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Roy_Goldring/Kerr_MM4-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8949-Kerr_MM4-V1.ps) >>/Users/jc/w/tmp/Tune-8949-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Roy_Goldring/Kerr_MM4-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
Coll_89490.log 1008500 Log file, useful mostly for debugging
Coll_89497.log 274495 Log file, useful mostly for debugging
Tune-8949-Kerr_MM4-V1.abc 156 ABC music file with the extracted tune(s)
Tune-8949-Kerr_MM4-V1.ps 6 PostScript
Tune-8949-Kerr_MM4-V1.txt 156 Plain-text file with the extracted tune(s)
Tune-8949-get.log 9752 Log file, useful mostly for debugging
Tune-89492-get.log 4692 Log file, useful mostly for debugging
Tune-89493-24CountryDances_1794_Preston.abc 168 ABC music file with the extracted tune(s)
Tune-89493-24CountryDances_1794_Preston.ps 6 PostScript
Tune-89493-24CountryDances_1794_Preston.txt 168 Plain-text file with the extracted tune(s)
Tune-89493-get.log 4508 Log file, useful mostly for debugging
Tune-89498-get.log 5246 Log file, useful mostly for debugging
These files should be available for 24 hours.