pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9617-Chase_13.ps) >>/Users/jc/w/tmp/Tune-9617-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/Chase_13.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_96179.log 253509 Log file, useful mostly for debugging
Form_96173.log 860 Log file, useful mostly for debugging
Form_96174.log 1663 Log file, useful mostly for debugging
Form_96177.log 0 Log file, useful mostly for debugging
Tune-9617-Chase_13.abc 614 ABC music file with the extracted tune(s)
Tune-9617-Chase_13.ps 43242 PostScript
Tune-9617-Chase_13.txt 614 Plain-text file with the extracted tune(s)
Tune-9617-get.log 4398 Log file, useful mostly for debugging
Tune-96172-get.log 3889 Log file, useful mostly for debugging
Tune-96173-get.log 1677 Log file, useful mostly for debugging
Tune-96176-get.log 7497 Log file, useful mostly for debugging
Tune-96177-get.log 1790 Log file, useful mostly for debugging
Tune-96178-get.log 4378 Log file, useful mostly for debugging
These files should be available for 24 hours.