pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4319-Gordon_Highlanders_Reel_2-A-32-4.ps) >>/Users/jc/w/tmp/Tune-4319-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/march/Gordon_Highlanders_Reel_2-A-32-4.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_4319.log 835 Log file, useful mostly for debugging
Form_43191.log 849 Log file, useful mostly for debugging
Tune-4319-Gordon_Highlanders_Reel_2-A-32-4.abc 826 ABC music file with the extracted tune(s)
Tune-4319-Gordon_Highlanders_Reel_2-A-32-4.ps 37650 PostScript
Tune-4319-Gordon_Highlanders_Reel_2-A-32-4.txt 826 Plain-text file with the extracted tune(s)
Tune-4319-get.log 9611 Log file, useful mostly for debugging
Tune-43197-get.log 3597 Log file, useful mostly for debugging
These files should be available for 24 hours.