Open documents in Kate in same window shows error.

Hi everyone!

I just followed the rules to make kate open all documents in same windows by changing it command line in file associations to “kate -u %U” instead of “kate %U”.

All works fine, after I click on document - kate opens it in same window, but if kate`s windows is opened I get this message: “KDEInit couldnt launch ‘/usr/bin/kate’.”
What i can do to fix it?

Thanks!