pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7896-Halloween-Dm-32-3.ps) >>/Users/jc/w/tmp/Tune-7896-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/reel/Halloween-Dm-32-3.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_78966.log 284020 Log file, useful mostly for debugging
Form_78960.log 939 Log file, useful mostly for debugging
Tune-7896-Halloween-Dm-32-3.abc 521 ABC music file with the extracted tune(s)
Tune-7896-Halloween-Dm-32-3.ps 35029 PostScript
Tune-7896-Halloween-Dm-32-3.txt 521 Plain-text file with the extracted tune(s)
Tune-7896-get.log 4836 Log file, useful mostly for debugging
These files should be available for 24 hours.