Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Kerr_MM/Hamilton_Kerr_MM2-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7377-Hamilton_Kerr_MM2-V1.ps) >>/Users/jc/w/tmp/Tune-7377-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr_MM/Hamilton_Kerr_MM2-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_73770.log 277305 Log file, useful mostly for debugging
Coll_73772.log 553246 Log file, useful mostly for debugging
Coll_73778.log 289950 Log file, useful mostly for debugging
Coll_73779.log 287140 Log file, useful mostly for debugging
Find_73777.log 1462 Log file, useful mostly for debugging
Tune-7377-Hamilton_Kerr_MM2-V1.abc 160 ABC music file with the extracted tune(s)
Tune-7377-Hamilton_Kerr_MM2-V1.ps 6 PostScript
Tune-7377-Hamilton_Kerr_MM2-V1.txt 160 Plain-text file with the extracted tune(s)
Tune-7377-get.log 4292 Log file, useful mostly for debugging
Tune-73771-get.log 6656 Log file, useful mostly for debugging
Tune-73773-get.log 5130 Log file, useful mostly for debugging
These files should be available for 24 hours.