pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-57506-Irish5.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-57506-Irish5.ps 2>>/Users/jc/w/tmp/Tune-57506-get.log" returned status 35584.
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57506-Irish5.ps) >>/Users/jc/w/tmp/Tune-57506-get.log 2>&1" returned status 256
http://jjaquier.free.fr/midifiles/abc/abc/Irish5.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_57506.log 259149 Log file, useful mostly for debugging
Form_57506.log 800 Log file, useful mostly for debugging
Tune-57506-Irish5.abc 540 ABC music file with the extracted tune(s)
Tune-57506-Irish5.ps 0 PostScript
Tune-57506-Irish5.txt 540 Plain-text file with the extracted tune(s)
Tune-57506-get.log 9818 Log file, useful mostly for debugging
These files should be available for 24 hours.