pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-17921-3415.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-17921-3415.ps 2>>/Users/jc/w/tmp/Tune-17921-get.log" returned status 256.
http://www.thefatlute.eu/rapid/view_song/d/3415

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Tune-17921-3415.abc 25655 ABC music file with the extracted tune(s)
Tune-17921-3415.ps 0 PostScript
Tune-17921-3415.txt 25655 Plain-text file with the extracted tune(s)
Tune-17921-get.log 20471 Log file, useful mostly for debugging
These files should be available for 24 hours.