Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM4/ERM-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3447-ERM-V1.ps) >>/Users/jc/w/tmp/Tune-3447-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM4/ERM-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_34470.log 149961 Log file, useful mostly for debugging
Tune-3447-ERM-V1.abc 142 ABC music file with the extracted tune(s)
Tune-3447-ERM-V1.ps 6 PostScript
Tune-3447-ERM-V1.txt 142 Plain-text file with the extracted tune(s)
Tune-3447-get.log 11258 Log file, useful mostly for debugging
Tune-34470-get.log 18728 Log file, useful mostly for debugging
Tune-34471-get.log 6054 Log file, useful mostly for debugging
Tune-34472-get.log 8975 Log file, useful mostly for debugging
Tune-34473-get.log 8247 Log file, useful mostly for debugging
Tune-34474-get.log 4778 Log file, useful mostly for debugging
Tune-34475-get.log 9589 Log file, useful mostly for debugging
Tune-34479-get.log 8413 Log file, useful mostly for debugging
These files should be available for 24 hours.