Parameter '<parametername>' already has a matching omitted argument

A procedure call supplies an argument by name after omitting the same argument by position. Following is an example:

Public Sub ABC(ByVal X As Byte, Optional ByVal Y As Byte = 0, _
                                Optional ByVal Z As Byte = 0)
' ...
' Argument Y is omitted by position, but supplied by name.
Call ABC(6, , Y:=3)   

Error ID: BC36566

To correct this error

  • Supply the argument by position, or remove the comma that omits it.

See Also

Concepts

Passing Arguments by Position and by Name