Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/slide/FOEFDA.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8617-FOEFDA.ps) >>/Users/jc/w/tmp/Tune-8617-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/slide/FOEFDA.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_86175.log 662811 Log file, useful mostly for debugging
Sess-86179.log 128336 Log file, useful mostly for debugging
Tune-8617-FOEFDA.abc 144 ABC music file with the extracted tune(s)
Tune-8617-FOEFDA.ps 6 PostScript
Tune-8617-FOEFDA.txt 144 Plain-text file with the extracted tune(s)
Tune-8617-get.log 3988 Log file, useful mostly for debugging
Tune-86173-get.log 1332 Log file, useful mostly for debugging
These files should be available for 24 hours.