Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Rare_Small/Kerr_MM3-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5183-Kerr_MM3-V2.ps) >>/Users/jc/w/tmp/Tune-5183-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Rare_Small/Kerr_MM3-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
Coll_51839.log 293212 Log file, useful mostly for debugging
Find_51832.log 1502 Log file, useful mostly for debugging
Tune-5183-Kerr_MM3-V2.abc 154 ABC music file with the extracted tune(s)
Tune-5183-Kerr_MM3-V2.ps 6 PostScript
Tune-5183-Kerr_MM3-V2.txt 154 Plain-text file with the extracted tune(s)
Tune-5183-get.log 4123 Log file, useful mostly for debugging
Tune-51831-get.log 1284 Log file, useful mostly for debugging
Tune-51839-get.log 5132 Log file, useful mostly for debugging
These files should be available for 24 hours.