Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Skye_HB/Hamilton_Kerr_MM2-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4079-Hamilton_Kerr_MM2-V1.ps) >>/Users/jc/w/tmp/Tune-4079-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Skye_HB/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
Tune-4079-Hamilton_Kerr_MM2-V1.abc 160 ABC music file with the extracted tune(s)
Tune-4079-Hamilton_Kerr_MM2-V1.ps 6 PostScript
Tune-4079-Hamilton_Kerr_MM2-V1.txt 160 Plain-text file with the extracted tune(s)
Tune-4079-get.log 4294 Log file, useful mostly for debugging
Tune-40791-get.log 4068 Log file, useful mostly for debugging
Tune-40795-IgnatiusSancho_CNS_v2.abc 159 ABC music file with the extracted tune(s)
Tune-40795-IgnatiusSancho_CNS_v2.ps 6 PostScript
Tune-40795-IgnatiusSancho_CNS_v2.txt 159 Plain-text file with the extracted tune(s)
Tune-40795-get.log 4351 Log file, useful mostly for debugging
Tune-40799-get.log 1396 Log file, useful mostly for debugging
These files should be available for 24 hours.