Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book26/Kerr_MM2-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4597-Kerr_MM2-V2.ps) >>/Users/jc/w/tmp/Tune-4597-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book26/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
Find_45974.log 1550 Log file, useful mostly for debugging
Find_45975.log 1519 Log file, useful mostly for debugging
Tune-4597-Kerr_MM2-V2.abc 150 ABC music file with the extracted tune(s)
Tune-4597-Kerr_MM2-V2.ps 6 PostScript
Tune-4597-Kerr_MM2-V2.txt 150 Plain-text file with the extracted tune(s)
Tune-4597-get.log 8837 Log file, useful mostly for debugging
Tune-45970-get.log 21470 Log file, useful mostly for debugging
Tune-45971-get.log 7787 Log file, useful mostly for debugging
Tune-45973-get.log 4671 Log file, useful mostly for debugging
Tune-45975-get.log 15302 Log file, useful mostly for debugging
Tune-45976-get.log 3656 Log file, useful mostly for debugging
Tune-45977-get.log 8561 Log file, useful mostly for debugging
Tune-45978-get.log 3622 Log file, useful mostly for debugging
These files should be available for 24 hours.