pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7797-Matthews_Standpiece.ps) >>/Users/jc/w/tmp/Tune-7797-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/SAFD/_/Matthews_Standpiece.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_7797.log 138572 Log file, useful mostly for debugging
Coll_77976.log 410621 Log file, useful mostly for debugging
Coll_77979.log 144017 Log file, useful mostly for debugging
Form_7797.log 0 Log file, useful mostly for debugging
Form_77970.log 878 Log file, useful mostly for debugging
Form_77973.log 849 Log file, useful mostly for debugging
Tune-7797-Matthews_Standpiece.abc 486 ABC music file with the extracted tune(s)
Tune-7797-Matthews_Standpiece.ps 34374 PostScript
Tune-7797-Matthews_Standpiece.txt 486 Plain-text file with the extracted tune(s)
Tune-7797-get.log 8761 Log file, useful mostly for debugging
Tune-77972-get.log 83063 Log file, useful mostly for debugging
Tune-77975-get.log 8129 Log file, useful mostly for debugging
Tune-77978-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.