pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2666-MrsStewartSintonsR.ps) >>/Users/jc/w/tmp/Tune-2666-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/MrsStewartSintonsR.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_26661.log 147647 Log file, useful mostly for debugging
Coll_26665.log 253509 Log file, useful mostly for debugging
Tune-2666-MrsStewartSintonsR.abc 495 ABC music file with the extracted tune(s)
Tune-2666-MrsStewartSintonsR.ps 35444 PostScript
Tune-2666-MrsStewartSintonsR.txt 495 Plain-text file with the extracted tune(s)
Tune-2666-get.log 4810 Log file, useful mostly for debugging
Tune-26664-get.log 3850 Log file, useful mostly for debugging
These files should be available for 24 hours.