pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-51028-V_12TB.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-51028-V_12TB.ps 2>>/Users/jc/w/tmp/Tune-51028-get.log" returned status 34304.
http://john-chambers.us/~jc/music/abc/src/jcabc2ps-201511002/abc/V_12TB.abc

Error exit status 34304; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Tune-51028-V_12TB.abc 682 ABC music file with the extracted tune(s)
Tune-51028-V_12TB.ps 0 PostScript
Tune-51028-V_12TB.txt 682 Plain-text file with the extracted tune(s)
Tune-51028-get.log 4785 Log file, useful mostly for debugging
These files should be available for 24 hours.