How to set a value from an output statement within a if clause

Question

I've this code in my stored procedure

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[VerifyBasketIdToUse_DBO]
        @Basket_IDD INT OUTPUT
AS
BEGIN
    SET NOCOUNT ON;
    IF (SELECT MAX(Basket_Id) FROM [Order]) = (SELECT MAX(Basket_Id) FROM [Order] WHERE Order_PayState=1)
        EXEC DBO.InsertBasket_DBO
        SET @Basket_IDD = @Basket_Id OUTPUT

    ELSE
        SET @Basket_IDD = (SELECT MAX(Basket_Id)FROM [Order])

SELECT @Basket_IDD
END

and this one for the SP with the output value

ALTER PROCEDURE [dbo].[InsertBasket_DBO]
        @Basket_Id INT OUTPUT
AS
BEGIN
    SET NOCOUNT ON;

    INSERT INTO [dbo].[Basket]([Basket_Amount])
    OUTPUT inserted.Basket_Id
    values (0)
END

but Sql Server notices that my @Basket_Id OUTPUT from the second Stored Procedure isn't defined in the first Stored Procedure, I don't understand why ? could someone help me ?

ALTER PROCEDURE [dbo].[VerifyBasketIdToUse_DBO]
        @Basket_IDD INT OUTPUT
AS
BEGIN
    IF (SELECT MAX(Basket_Id) FROM [Order]) = (SELECT MAX(Basket_Id) FROM [Order] WHERE Order_PayState=1)
        BEGIN
        EXEC @Basket_IDD = dbo.InsertBasket_DBO
        END
    ELSE
        BEGIN
        SET @Basket_IDD = (SELECT MAX(Basket_Id)FROM [Order])
        END
SELECT @Basket_IDD
END

Answer 1

Inside first procedure, instead of

EXEC DBO.InsertBasket_DBO
SET @Basket_IDD = @Basket_Id OUTPUT

use

EXEC DBO.InsertBasket_DBO @Basket_IDD OUTPUT

In second procedure, replace

INSERT INTO [dbo].[Basket]([Basket_Amount])
OUTPUT inserted.Basket_Id
values (0)

with

INSERT INTO [dbo].[Basket]([Basket_Amount])
values (0)
select @Basket_Id = scope_identity()

I can't check syntax and results just now, but I hope this gives you some directions :)