pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9541-session0.ps) >>/Users/jc/w/tmp/Tune-9541-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Ireland/session/session0.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_95418.log 133127 Log file, useful mostly for debugging
Find_95415.log 1595 Log file, useful mostly for debugging
Form_95410.log 854 Log file, useful mostly for debugging
Tune-9541-get.log 9549 Log file, useful mostly for debugging
Tune-9541-session0.abc 0 ABC music file with the extracted tune(s)
Tune-9541-session0.ps 0 PostScript
Tune-95410-get.log 4460 Log file, useful mostly for debugging
Tune-95419-get.log 10167 Log file, useful mostly for debugging
These files should be available for 24 hours.