pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-7209-Kerr_MM3-V2.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-7209-Kerr_MM3-V2.ps 2>>/Users/jc/w/tmp/Tune-7209-get.log" returned status 256.
http://john-chambers.us/~jc/music/book/Kerr/MM3/Kerr_MM3-V2.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Coll_72096.log 110847 Log file, useful mostly for debugging
Form_72095.log 934 Log file, useful mostly for debugging
Tune-7209-Kerr_MM3-V2.abc 0 ABC music file with the extracted tune(s)
Tune-7209-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.