Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM4/HibernianMuse-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8735-HibernianMuse-V1.ps) >>/Users/jc/w/tmp/Tune-8735-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM4/HibernianMuse-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
Find_87356.log 1495 Log file, useful mostly for debugging
Find_87358.log 1574 Log file, useful mostly for debugging
Tune-8735-HibernianMuse-V1.abc 152 ABC music file with the extracted tune(s)
Tune-8735-HibernianMuse-V1.ps 6 PostScript
Tune-8735-HibernianMuse-V1.txt 152 Plain-text file with the extracted tune(s)
Tune-8735-get.log 4184 Log file, useful mostly for debugging
Tune-87352-get.log 4136 Log file, useful mostly for debugging
Tune-87359-get.log 5530 Log file, useful mostly for debugging
These files should be available for 24 hours.