pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22060-CircassianCircle0.ps) >>/Users/jc/w/tmp/Tune-22060-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/CircassianCircle0.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_22060.log 121861 Log file, useful mostly for debugging
Form_22060.log 882 Log file, useful mostly for debugging
Tune-22060-CircassianCircle0.abc 412 ABC music file with the extracted tune(s)
Tune-22060-CircassianCircle0.ps 34698 PostScript
Tune-22060-CircassianCircle0.txt 412 Plain-text file with the extracted tune(s)
Tune-22060-get.log 4578 Log file, useful mostly for debugging
These files should be available for 24 hours.