pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3167-WHEN_THE_SAINTS_GO_MARCHING_IN_SAINTMAR_1.ps) >>/Users/jc/w/tmp/Tune-3167-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/WHEN_THE_SAINTS_GO_MARCHING_IN_SAINTMAR_1.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
Form_31670.log 782 Log file, useful mostly for debugging
Form_31676.log 726 Log file, useful mostly for debugging
Tune-3167-WHEN_THE_SAINTS_GO_MARCHING_IN_SAINTMAR_1.abc 463 ABC music file with the extracted tune(s)
Tune-3167-WHEN_THE_SAINTS_GO_MARCHING_IN_SAINTMAR_1.ps 36965 PostScript
Tune-3167-WHEN_THE_SAINTS_GO_MARCHING_IN_SAINTMAR_1.txt 463 Plain-text file with the extracted tune(s)
Tune-3167-get.log 5125 Log file, useful mostly for debugging
Tune-31670-get.log 5084 Log file, useful mostly for debugging
Tune-31671-get.log 2860 Log file, useful mostly for debugging
Tune-31675-get.log 3760 Log file, useful mostly for debugging
Tune-31676-get.log 5049 Log file, useful mostly for debugging
Tune-31679-get.log 4943 Log file, useful mostly for debugging
These files should be available for 24 hours.