pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2429-Devil_in_the_Kitchen-A-32-4.ps) >>/Users/jc/w/tmp/Tune-2429-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/reel/Devil_in_the_Kitchen-A-32-4.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_24292.log 284021 Log file, useful mostly for debugging
Coll_24297.log 285167 Log file, useful mostly for debugging
Form_24292.log 928 Log file, useful mostly for debugging
Tune-2429-Devil_in_the_Kitchen-A-32-4.abc 670 ABC music file with the extracted tune(s)
Tune-2429-Devil_in_the_Kitchen-A-32-4.ps 39052 PostScript
Tune-2429-Devil_in_the_Kitchen-A-32-4.txt 670 Plain-text file with the extracted tune(s)
Tune-2429-get.log 5303 Log file, useful mostly for debugging
These files should be available for 24 hours.