pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3860-Speed_The_Plough_R.ps) >>/Users/jc/w/tmp/Tune-3860-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/by/John_Morehead/Speed_The_Plough_R.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
Tune-3860-Speed_The_Plough_R.abc 826 ABC music file with the extracted tune(s)
Tune-3860-Speed_The_Plough_R.ps 36218 PostScript
Tune-3860-Speed_The_Plough_R.txt 826 Plain-text file with the extracted tune(s)
Tune-3860-get.log 4886 Log file, useful mostly for debugging
These files should be available for 24 hours.