ORA-00957 Duplicate Column Name Materialized View ( UPDATED: Not answered)

Question

Hello all.  I am getting this error when trying to create a Materialized View.  I have many other MV I created without problem, but I cannot find the catch up here, can anyone help?.  I cannot find any duplicates. The only duplicate I though was the Pipeline_Code column that was entered into the function and the one being being called out as a column. To check, I renamed the latter and still am getting this issue.
Any help would be greatly appreciated.
Thanks!
The query is below:
CREATE MATERIALIZED VIEW MV_TEST_STATION
REFRESH COMPLETE
START WITH TO_DATE('20-SEP-2013 00:00:00','dd-mon-yyyy hh24:mi:ss')
NEXT (SYSDATE +12/24)
AS
SELECT T.TEST_STATION_ID,
       --(SELECT TEST_STATION_TYPE.DESCRIPTION
        --  FROM TEST_STATION_TYPE
       --  WHERE TEST_STATION.TEST_STATION_TYPE =
           --       TEST_STATION_TYPE.TEST_STATION_TYPE)
         --AS TEST_STATION_TYPE,
        TST.DESCRIPTION AS TEST_STATION_TYPE,
       T.SURVEY,
       T.STATUS,
       T.STATION,
       F_TRUESTATION2 (
          T.STATION,
          T.PIPELINE_CODE,
          F_REROUTE_CODE (T.STATION,
                                  T.PIPELINE_CODE))
          AS TRUE_STATION,
       T.REQUIRED,
      -- (SELECT PIPELINE_CODES.PIPELINE_CODE_DESCRIPTION
       --   FROM PIPELINE_CODES
        -- WHERE TEST_STATION.PIPELINE_CODE = PIPELINE_CODES.PIPELINE_CODE)
       --   AS PIPELINE_CODE,
       PC.PIPELINE_CODE_DESCRIPTION AS PC_PIPELINE_CODE,
       T.INSTALL_DATE,
       T.FUNCTIONAL COMMENTS,
       TSR.TEST_STATION_READING_ID,
       TSR.TEST_DATE,
       TSR.SURVEYOR,
       TSR.ON_VOLTS,
       TSR.ON_BG,
       TSR.ON_AG,
       TSR.METER_UTC,
       TSR.METER_ID,
       TSR.IO_BG,
       TSR.IO_AG,
       TSR.INSTANT_OFF_VOLTS,
       TSR.FUNCTIONAL_DAMAGE_OUT,
       TSR.FUNCTIONAL_DAMAGE_IN,
       TSR.COSEMETIC_DAMAGE_OUT,
       TSR.COSEMETIC_DAMAGE_IN,
       TSR.COMMENTS,
       TSR.CASING_ON,
       TSR.CASING_OFF,
       TSR.CASING,
       TSR.CALIBRATION_DUE_DATE,
       TSR.ANODE_AMPS_ON,
       TSR.ANODE_AMPS_OFF,
       TSR.ANODE
  FROM TEST_STATION T
INNER JOIN TEST_STATION_TYPE TST ON T.TEST_STATION_TYPE = TST.TEST_STATION_TYPE
INNER JOIN PIPELINE_CODES PC ON T.PIPELINE_CODE = PC.PIPELINE_CODE
  INNER JOIN TEST_STATION_READING TSR ON T.TEST_STATION_ID = TSR.TEST_STATION_ID
WHERE T.TEST_STATION_ID = TSR.TEST_STATION_ID

Answer 1

since we don't have your tables or data, we can not run, test, fix or  improve posted code
How do I ask a question on the forums?
https://forums.oracle.com/message/9362002#9362002