I have a problem. I made a Process Builder that will update a lookup field with an user (this field will be used to define an approver).

But the formula I'm trying to use returns error, although there seems to be ok:

CASE( [Case].Type,

 A, ID user 1,

B, ID user 2)

The error is the following: Formula expression is invalid: Syntax error. ')'not found.

In the same formula, if I put any text between ", it accepts. But it won't work...

Can anyone help me?