Hi Omniscopers,

I'm trying to use Searchregex formula to pull

=searchregex("^.{3}[A-Za-z0-9 ]+\K.",[Campaing],1)

Searchregex usually works but not when I add the "\" in \K I get an error: Error with formula: Invalid text """ - an open bracket, literal number, reference or function was expected.

When I remove the slash the formula works but I need that slash in it. Why is this not working?
Thanks,
John.