The mentioned file IS stored on my harddisk, and when I open up the terminal and enter "mate /tmp/textmate_scratch_2008-09-19.14.25.54_fh13.txt" there, TextMate opens the file without any problems at all...
It is not that bad because, as I said, everything works nonetheless. But of course I'd still like to get rid of that error message. So, what's going wrong?
I guess Ruby cannot find the command 'mate' in $PATH.
Try this on the Console:
which mate
You get something like /usr/local/bin/mate
and then open the Bundle Editor > Scratch > Scratch from current Selection:
last line:
`/usr/local/bin/mate #{e_sh(path)}`
Cheers,
--Hans