Must declare the scalar variable error

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SQL-Server

Hi,
I constantly getting error
Msg 137, Level 15, State 2, Line 2
Must declare the scalar variable "@SQLID".

The procedure is as follows:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[WriteToLog](@Exe_module NVARCHAR(MAX) , @SQLID NVARCHAR(MAX) , @InputMode as CHAR(1) = 'I' )
    AS
    BEGIN

    DECLARE @SQL AS NVARCHAR(MAX)

    IF @InputMode = 'I'
    BEGIN

                    SET @SQL = 'INSERT INTO ExecutionLog (As_of_date, Exe_module, SqlId,TimeFrom)
                    VALUES (dbo.GetParameters(1012),Exe_module,@SQLID,GETDATE())';

                    EXECUTE sp_executesql @SQL;
    END
    ELSE

            SET @SQL = '    UPDATE O  SET  TimeTo = GETDATE(), Status = ''F''
                            FROM  ExecutionLog O
                    JOIN
                            (
                                    SELECT
                                            MAX(ID) ID--,  ROW_NUMBER() OVER (PARTITION BY  ID ORDER BY ID DESC) AS rn
                                    FROM
                                    ExecutionLog --Group by id
                            ) S ON O.id = S.id '


END;

The same is called from another procedure as follows
EXECUTE dbo.WriteToLog @Exe_module = 'Truncating ExecutionLog table', @SQLID = @sSQL, @InputMode = 'I'
Please if someone can help me solve the problem. What is wrong with this procedure?
Thanks in advance
A