iSeries Stored Procedure with SQL CTE Error

When trying to run EXPLAIN on the following stored procedure we get the error message:

'Cannot display the query diagram because the query access plan information was not collected for the query'.

--  Generate SQL
--  Version:                         V6R1M0 080215
--  Generated on:                    04/28/15 14:48:42
-- --  Standards Option:                DB2 for i
SET PATH "QSYS","QSYS2","SYSPROC","SYSIBMADM","USER" ;
 
CREATE PROCEDURE ADC/PROVIDERS_SELECT_V3_dee(
      IN IN_FACILITY_CODE CHAR(4) )
      DYNAMIC RESULT SETS 1
      LANGUAGE SQL
      SPECIFIC ADC/PROVIDERS_SELECT_V3_dee
      NOT DETERMINISTIC
      READS SQL DATA
      CALLED ON NULL INPUT
      SET OPTION  ALWBLK = *ALLREAD ,
      ALWCPYDTA = *OPTIMIZE ,
      COMMIT = *NONE ,
      CLOSQLCSR = *ENDMOD ,
      DECRESULT = (31, 31, 00) ,
      DFTRDBCOL = *NONE ,
      DYNDFTCOL = *NO ,
      DYNUSRPRF = *USER ,
      SRTSEQ = *HEX  
      BEGIN
DECLARE C1 CURSOR   FOR
 WITH
ACTIVEPROVIDERS AS (
      SELECT
            PIPRV@ AS ID ,
            PINAMD AS NAME ,
            PIPRVT AS TYPE ,
            PIDEL@ AS STATUS ,
            PIDTTERM AS TERMINATIONDATE ,
            PWEXTVAL AS DOSESPOTCLINICIANID
      FROM
            PRVMAS PM LEFT OUTER JOIN
            PRVEXT ON PIPRV@ = PWPRV@ AND PWEXT@ = 'CI'
      WHERE
            PIPRV@ <> '***' AND
            PIABRV <> '.' AND
            PIDEL@ = 'A' AND
            PIDTTERM = '1940-01-01' ) ,      

 
LOCALPROVIDERS AS (
      SELECT
            BWPRV@ AS ID
      
      FROM
            FACPRVLOOK
      WHERE
            BWFAC@ = '4131'
)
 
SELECT
      AP . ID ,
      AP . NAME ,
      AP . TYPE ,
      AP . STATUS ,
      AP . TERMINATIONDATE ,
      AP . DOSESPOTCLINICIANID ,
      CASE WHEN LP . ID IS NULL THEN 'False' ELSE 'True' END AS ISLOCAL
FROM
      ACTIVEPROVIDERS AP LEFT OUTER JOIN
      LOCALPROVIDERS LP ON AP . ID = LP . ID
FOR READ ONLY ;
 
OPEN C1 ;
END  ;
 
COMMENT ON SPECIFIC PROCEDURE ADC/PROVIDERS_SELECT_V3
      IS 'Returns list of all providers for ADC' ;
 
COMMENT ON PARAMETER SPECIFIC PROCEDURE ADC/PROVIDERS_SELECT_V3
( IN_FACILITY_CODE IS 'Facility Code' ) ;