Command(s) completed successfully. However the multi-part identifier cannot be found

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SQL-Server-2008R2

ALTER PROCEDURE [dbo].[rpt_Inc_Xtat]
 (
   @CINCIDENT VARCHAR(50),
   @CDDL1     VARCHAR(50),
   @CDDL2     VARCHAR(50),
   @CDCOMPT   VARCHAR(50),
   @CFROM     DATETIME   ,
   @CTO       DATETIME 
)
AS
  BEGIN
        DECLARE @sql nvarchar(4000)
       SELECT  A.BRN_NAME,A.COMP_NO, A.COMP_CODE, A.COMPLAINANT, A.PTICK_CODE, 
                  SUM(CASE WHEN DATEADD(DD,P.PROD_SERV_TAT, A.COMP_DATE) < COALESCE(A.DAT_COMP_INV_CLOSE0,A.DAT_COMP_INV_CLOSE,A.DATE_COMP_CLOS_FRMT)THEN 1 ELSE 0 END) AS ACCEPT_TAT,
				   COUNT(*) AS OVER_CNT ,
				  (SELECT COUNT(*) FROM RESPONSE A , BB    WHERE A.BRN_NAME=BB.BRN_NAME) AS GRP_CNT,
				    P.PROD_SERV_TAT
                    FROM RESPONSE A , BB
                    LEFT  JOIN BRANCH    C   ON A.BRN_NAME   = C.BRN_NAME
                    LEFT  JOIN PROD_SERV P   ON A.PROD_SERV  = P.PROD_SERV_NAME
                    LEFT  JOIN PAYMAST   B   ON A.LNAME      = B.LNAME
                                         AND  A.FNAME        = B.FNAME
                                         AND  A.EMPNO        = B.EMPNO 
                    WHERE (A.COMP_DATE BETWEEN @CFROM AND @CTO) 
                    GROUP BY  A.BRN_NAME,A.COMP_NO, A.COMP_CODE,A.COMPLAINANT, A.PTICK_CODE, P.PROD_SERV_TAT 

			
  END

Errors

1. Invalid object name 'BB'

(SELECT COUNT(*) FROM RESPONSE A , BB    WHERE A.BRN_NAME=BB.BRN_NAME) AS
  GRP_CNT,

2.

LEFT  JOIN BRANCH    C   ON A.BRN_NAME   = C.BRN_NAME
                    LEFT  JOIN PROD_SERV P   ON A.PROD_SERV  = P.PROD_SERV_NAME
                    LEFT  JOIN PAYMAST   B   ON A.LNAME      = B.LNAME
                                         AND    A.FNAME        = B.FNAME
                                         AND    A.EMPNO        = B.EMPNO 

The multi part-identifier "A.PROD_SERV" could not be found
The multi part-identifier "A.LNAME" could not be found
The multi part-identifier "A.FNAME" could not be found
The multi part-identifier "A.PROD_SERV" could not be found

What I have tried:

Have a similar codes which works.

What am doing here is I have introduced a subquery to COUNT on GROUP .