pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-52049-OSJ_carp.ps) >>/Users/jc/w/tmp/Tune-52049-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/ifdo.pugmarks.com/~seymour/ottawaslowjam/OSJ_carp/%374:PIBROCHODONALDDHU.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
Tune-52049-OSJ_carp.abc 508 ABC music file with the extracted tune(s)
Tune-52049-OSJ_carp.ps 35485 PostScript
Tune-52049-OSJ_carp.txt 508 Plain-text file with the extracted tune(s)
Tune-52049-get.log 5268 Log file, useful mostly for debugging
These files should be available for 24 hours.