pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-27803-Gow4.abc -F fmt/pdf_55.fmt +s 0.55 +maxs 2000 )>/Users/jc/w/tmp/Tune-27803-Gow4.ps 2>>/Users/jc/w/tmp/Tune-27803-get.log" returned status 35584.
http://roaringjelly.org/~jc/music/book/Gow/Gow4.abc

Error exit status 35584; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_27803.log 266066 Log file, useful mostly for debugging
Tune-27803-Gow4.abc 2127 ABC music file with the extracted tune(s)
Tune-27803-Gow4.ps 38722 PostScript
Tune-27803-Gow4.txt 2127 Plain-text file with the extracted tune(s)
Tune-27803-get.log 5379 Log file, useful mostly for debugging
These files should be available for 24 hours.