pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6301-4021.ps) >>/Users/jc/w/tmp/Tune-6301-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/4021=the_Days_o_Yore.abc2.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_6301.log 1430811 Log file, useful mostly for debugging
Coll_63011.log 1257995 Log file, useful mostly for debugging
Coll_63012.log 1428001 Log file, useful mostly for debugging
Form_63017.log 2009 Log file, useful mostly for debugging
Tune-6301-4021.abc 1223 ABC music file with the extracted tune(s)
Tune-6301-4021.ps 40283 PostScript
Tune-6301-4021.txt 1223 Plain-text file with the extracted tune(s)
Tune-6301-get.log 4758 Log file, useful mostly for debugging
Tune-63016-get.log 7344 Log file, useful mostly for debugging
These files should be available for 24 hours.