pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6230-3344_Marchmont_House.ps) >>/Users/jc/w/tmp/Tune-6230-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/3344_Marchmont_House.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_6230.log 124616 Log file, useful mostly for debugging
Coll_62304.log 1425191 Log file, useful mostly for debugging
Coll_62305.log 1255185 Log file, useful mostly for debugging
Form_62302.log 1103 Log file, useful mostly for debugging
Tune-6230-3344_Marchmont_House.abc 1148 ABC music file with the extracted tune(s)
Tune-6230-3344_Marchmont_House.ps 44424 PostScript
Tune-6230-3344_Marchmont_House.txt 1148 Plain-text file with the extracted tune(s)
Tune-6230-get.log 4603 Log file, useful mostly for debugging
These files should be available for 24 hours.