I am trying to call a proc which has a simple interface:

ALTER PROCEDURE [dbo].[sp_ABC]
(
      @ProcessID int = null,
      @FrequencyID int = null, 

)

I have set the @ProcessID value in the LLBL to "Is Nullable"

When I call the proc:

RetrievalProcedures.ABC(null,1);

I get the error:

Procedure or function 'sp_ABC' expects parameter '@ProcessID', which was not supplied.

What am I missing?

My Bad.

I was pointing at the wrong database.

Easily done Thanks for updating.