KMail tells: "Unable to create persistent search"

[Andreas Gungl]

Hi,

did a search in the web but didn't find a solution for how to solve the 
problem: When I search for messages, I end up with the error message:
"Unable to create persistent search"

I have no search folder around, maybe that's the problem. Should I need to 
create one manually? Any other hints like restarting akonadi etc. didn't help.
How can I make the search working again?

Best regards,
Andreas