pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2795-Confess.ps) >>/Users/jc/w/tmp/Tune-2795-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/Confess.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_27956.log 1379428 Log file, useful mostly for debugging
Form_2795.log 994 Log file, useful mostly for debugging
Tune-2795-Confess.abc 271 ABC music file with the extracted tune(s)
Tune-2795-Confess.ps 33144 PostScript
Tune-2795-Confess.txt 271 Plain-text file with the extracted tune(s)
Tune-2795-get.log 4276 Log file, useful mostly for debugging
Tune-27951-get.log 7484 Log file, useful mostly for debugging
Tune-27953-get.log 4405 Log file, useful mostly for debugging
Tune-27955-get.log 4402 Log file, useful mostly for debugging
These files should be available for 24 hours.