Optional parameters must specify a default value

  • Article

Optional parameters must provide default values that can be used if no parameter is supplied by a calling procedure.

Error ID: BC30812

To correct this error

  • Specify default values for optional parameters; for example:

    Sub Proc1(ByVal X As Integer, 
      Optional ByVal Y As String = "Default Value")
   MsgBox("Default argument is: " & Y)
End Sub

See Also

Reference

Optional (Visual Basic)