pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2613-all.ps) >>/Users/jc/w/tmp/Tune-2613-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ViolaRuth/AdvancedSD/all.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_26135.log 142807 Log file, useful mostly for debugging
Coll_26139.log 295809 Log file, useful mostly for debugging
Form_26132.log 742 Log file, useful mostly for debugging
Form_26137.log 761 Log file, useful mostly for debugging
Tune-2613-all.abc 654 ABC music file with the extracted tune(s)
Tune-2613-all.ps 40563 PostScript
Tune-2613-all.txt 654 Plain-text file with the extracted tune(s)
Tune-2613-get.log 4211 Log file, useful mostly for debugging
Tune-26130-get.log 4125 Log file, useful mostly for debugging
Tune-26137-get.log 3244 Log file, useful mostly for debugging
Tune-26139-get.log 20353 Log file, useful mostly for debugging
These files should be available for 24 hours.