If the data in field(Model.model) is like this Ohm's it will return an error, if I make it Ohms it works.

Is there another way I can write my selection formula to make it work?

report.RecordSelectionFormula = "{model.brandid}= " & DataCombo4.BoundText & " and {model.model}= '" & DataCombo5.Text & "'" ' String variable has to be enclosed in ' '