[geotso[_2_]]

then, "Jay Freedman" climbed to the rostrum and said:
If you use a wildcard expression but forget to check the "Use wildcards" box, it
simply won't find anything. But if the box is checked and the expression isn't
correctly formed according to the wildcard rules, then you get a message box
saying that the search expression isn't valid. From geotso's post, I gathered
that he saw the message box.

I do see the message box, as you said, and I'm pretty sure I check the "use
wildcards" checkbox!