Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/jig/MMM2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4816-MMM2.ps) >>/Users/jc/w/tmp/Tune-4816-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jig/MMM2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Sess-48165.log 8400 Log file, useful mostly for debugging
Tune-4816-MMM2.abc 140 ABC music file with the extracted tune(s)
Tune-4816-MMM2.ps 6 PostScript
Tune-4816-MMM2.txt 140 Plain-text file with the extracted tune(s)
Tune-4816-get.log 3934 Log file, useful mostly for debugging
Tune-48161-get.log 5646 Log file, useful mostly for debugging
Tune-48162-get.log 5145 Log file, useful mostly for debugging
Tune-48163-get.log 4002 Log file, useful mostly for debugging
Tune-48165-get.log 3967 Log file, useful mostly for debugging
Tune-48167-get.log 4032 Log file, useful mostly for debugging
These files should be available for 24 hours.