description Learn more about: .ERRNB title .ERRNB ms.date 12/17/2019 f1_keywords .ERRNB helpviewer_keywords .ERRNB directive ms.assetid 3b9a6f5e-9a4d-47a8-a1f6-b199328937de .ERRNB Generates an error if textitem is not blank. Syntax .ERRNB textitem ⟦, message⟧ See also Directives Reference MASM BNF Grammar