Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book06/MSRPB.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5406-MSRPB.ps) >>/Users/jc/w/tmp/Tune-5406-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book06/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-5406-MSRPB.abc 144 ABC music file with the extracted tune(s)
Tune-5406-MSRPB.ps 6 PostScript
Tune-5406-MSRPB.txt 144 Plain-text file with the extracted tune(s)
Tune-5406-get.log 12383 Log file, useful mostly for debugging
Tune-54060-get.log 18962 Log file, useful mostly for debugging
Tune-54063-get.log 8148 Log file, useful mostly for debugging
Tune-54064-24CountryDances_1766_Johnson.abc 167 ABC music file with the extracted tune(s)
Tune-54064-24CountryDances_1766_Johnson.txt 167 Plain-text file with the extracted tune(s)
Tune-54064-get.log 3522 Log file, useful mostly for debugging
Tune-54065-get.log 1367 Log file, useful mostly for debugging
Tune-54068-get.log 5525 Log file, useful mostly for debugging
Tune-54069-get.log 4537 Log file, useful mostly for debugging
These files should be available for 24 hours.