Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/HUTB1/MSRPB.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6386-MSRPB.ps) >>/Users/jc/w/tmp/Tune-6386-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/HUTB1/MSRPB.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-6386-MSRPB.abc 143 ABC music file with the extracted tune(s)
Tune-6386-MSRPB.ps 6 PostScript
Tune-6386-MSRPB.txt 143 Plain-text file with the extracted tune(s)
Tune-6386-get.log 8147 Log file, useful mostly for debugging
Tune-63861-PaulBackstrom-LfD.abc 158 ABC music file with the extracted tune(s)
Tune-63861-PaulBackstrom-LfD.ps 6 PostScript
Tune-63861-PaulBackstrom-LfD.txt 158 Plain-text file with the extracted tune(s)
Tune-63861-get.log 4283 Log file, useful mostly for debugging
Tune-63862-get.log 1352 Log file, useful mostly for debugging
Tune-63863-get.log 3800 Log file, useful mostly for debugging
Tune-63864-get.log 7367 Log file, useful mostly for debugging
Tune-63865-get.log 3015 Log file, useful mostly for debugging
Tune-63866-get.log 1313 Log file, useful mostly for debugging
Tune-63869-get.log 4489 Log file, useful mostly for debugging
These files should be available for 24 hours.