Hash Table -Runtime error.

Question

Hi,
i am defining internal table as hash table but it is giving runtime error like bolow. some times it is executing properly or giving dump.please give me some suggestions to come out of this problem.
Ex:
What happened?
    Error in the ABAP Application Program
    The current ABAP program "SAPLZGIT_MED" had to be terminated because it has
    come across a statement that unfortunately cannot be executed.
Error analysis
    An entry was to be entered into the table
     "\FUNCTION=ZBAPI_GIT_MED_HD_BOTELLAS_RPT\DATA=T_THERAPY_INFO" (which should
     have
    had a unique table key (UNIQUE KEY)).
    However, there already existed a line with an identical key.
    The insert-operation could have ocurred as a result of an INSERT- or
    MOVE command, or in conjunction with a SELECT ... INTO.
    The statement "INSERT INITIAL LINE ..." cannot be used to insert several
     initial lines into a table with a unique key.
Code: .....................................
TYPES: BEGIN OF X_THERAPY_INFO,
                GIT_THERAPY_ID     TYPE ZGIT_VBELN_GIT,
                CHO_THERAPY_ID     TYPE VBELN,
                SERVICE_ID         TYPE MATNR,
                SERVICE_DESC       TYPE ARKTX,
                FLOW               TYPE ZGIT_ZFLOW,
                DURATION           TYPE ZGIT_ZDURATION,
                GIT_PAT_ID         TYPE ZGIT_KUNNR_GIT,
                CHORUS_PAT_ID      TYPE KUNNR,
           END OF X_THERAPY_INFO,
DATA:
T_THERAPY_INFO           TYPE HASHED TABLE OF X_THERAPY_INFO WITH UNIQUE KEY        GIT_THERAPY_ID,                " Internal table for extracting the therapy Informamtion
Extract the Therapy Details
  SELECT   VBELN_GIT
           VBELN
           MATNR
           ARKTX
           ZFLOW
           ZDURATION
           KUNNR_GIT
           KUNNR
  INTO     TABLE     T_THERAPY_INFO
  FROM     ZGIT_T_VBAK
  WHERE    KUNNR_GIT   NE SPACE
  AND      KVGR2       IN TR_KVGR2
  AND      ZDOCTOR     IN TR_DOC_SEL_ID
  AND      ZHOSPITAL   IN TR_HOSPITAL_ID
  AND    ( ZSTATUS_ID  NE C_HIDDEN
  AND      ZSTATUS_ID  NE C_DISABLED
  AND      ZSTATUS_ID  NE C_OTHERS )
  AND      VBELN       IN TR_VBELN.
  IF SY-SUBRC NE C_0.
Thanks in advance,
Srinivas P

Answer 1

When you are using hashed tables, you cannot have duplicate records (considering it's key). So DELETE ADJACENT DUPLICATES won't solve it. It will dump before that.
Find if you are inserting records with the same fields you inserted in the key.
Example.
If your key is VBELN, you cannot make it like this:
SELECT a~vbeln b~matnr
   INTO TABLE hashed_itab
  FROM vbak AS a INNER JOIN vbap as b
   ON a~vbeln = b~vbeln
WHERE ...
It will dump if your vbeln has 2 lines in vbap.
Two solutions:
1 - expand the itab key to VBELN and POSNR (for example) or
2
SELECT DISTINCT a~vbeln b~matnr
   INTO TABLE hashed_itab
  FROM vbak AS a INNER JOIN vbap as b
   ON a~vbeln = b~vbeln
WHERE ...
Regards,
Valter Oliveira.