Conversion failed when converting the varchar value 'my returned value' to data type int

Question

I get this error in this simple SQL statement when trying to retrieve a string from a table.

Msg 245, Level 16, State 1, Procedure prViewRequirements, Line 18 Conversion

Answer 1

Try this one -

ALTER PROCEDURE [dbo].[prViewRequirements]

      @WFRouteID INT
    , @DocumentDescription VARCHAR(100) OUTPUT

AS BEGIN

    SELECT @DocumentDescription = t.DocumentDescription
    FROM dbo.tbFollowOnTracking t
    WHERE t.WFRouteID = @WFRouteID
        AND t.IsActive = 1

    IF @DocumentDescription IS NULL
        RETURN -1    

    RETURN 0

END