ORA-30926: unable to get a stable set of rows in the source tables


I am doing a merge into statement across a database link and keep getting the ORA-30926 error: My merge into statement is below:
Any ideas - thanks for looking;

MERGE INTO sku_invn a
     USING sku_invn@wmsp b
        ON (a.sku_id = b.sku_id AND a.whse = b.whse)
              a.INVN_TYPE = b.INVN_TYPE,
              a.PROD_STAT = b.PROD_STAT,
              a.BATCH_NBR = b.BATCH_NBR,
              a.SKU_ATTR_1 = b.SKU_ATTR_1,
              a.SKU_ATTR_2 = b.SKU_ATTR_2,
              a.SKU_ATTR_3 = b.SKU_ATTR_3,
              a.SKU_ATTR_4 = b.SKU_ATTR_4,
              a.SKU_ATTR_5 = b.SKU_ATTR_5,
              a.CNTRY_OF_ORGN = b.CNTRY_OF_ORGN,
              a.QTY_ON_HAND = b.QTY_ON_HAND,
              a.QTY_NOT_ALLOC = b.QTY_NOT_ALLOC,
              a.QTY_ALLOC = b.QTY_ALLOC,
              a.QTY_SOFT_ALLOC = b.QTY_SOFT_ALLOC,
              a.QTY_IN_INTRAN = b.QTY_IN_INTRAN,
              a.MGMT_ALLOC_INVN = b.MGMT_ALLOC_INVN,
              a.QTY_IN_WIP = b.QTY_IN_WIP,
              a.QTY_TO_BE_ALLOC = b.QTY_TO_BE_ALLOC,
              a.MOD_DATE_TIME = b.MOD_DATE_TIME,
              a.USER_ID = b.USER_ID
   INSERT     (WHSE,
       VALUES (b.WHSE,
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Naveen KumarProduction Manager / Application Support ManagerCommented:
This error can come in the merge statement due to dupliate data in the tables. Can you verify whether there are any duplicates.

also have a look at this url

Naveen KumarProduction Manager / Application Support ManagerCommented:
or instead of using "USING sku_invn@wmsp b", try with an inline view "USING (select ... from .. where ... ) " followed by ON (..)

just ensure that the inline view you are creating can pick up the data without duplicates after which your merge should be able to work fine. test it out.


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Naveen KumarProduction Manager / Application Support ManagerCommented:
http://stackoverflow.com/questions/2337271/ora-30926-unable-to-get-a-stable-set-of-rows-in-the-source-tables - an example of how to use an inline view in the merge is shown in this url.
Naveen KumarProduction Manager / Application Support ManagerCommented:
Good and thanks
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