Problem mapping header/items in 1 Message Type

Hello,
I'm currently facing the following problem in my message mapping:
On my 'CRM side'
I have a MessageType (DataType) consisting out of +/- 10 header fields and a field called 'ITEMS'
'ITEMS' is table type field consisting out of +/- 5 item fields. Ofcourse 'ITEMS' can occur min1 time - max ?? times
On My 'Dbase' side I have a MT containing 2 'update' statements
1 table is updated for every header record ( mapped with header fields )
1 table is updated for every item ( mapped with header fields as well as item fields )
As far as the header data is concerned everything works fine.
The problem is in the update per item.
The fields that are mapped with the fields inside 'ITEMS' are working fine.
But ... I need to put 3 fields from my header level in the 'item table' as well. So I mapped them from header level to 'Item table'
This seems to work fine as long as I have only 1 item. From the moment I have more then 1 item, the mapping throws an error that he can not create the target item.
I have the impression that he 'looses' the link between header and item(s) from the second item on.
Can somebody let me know that I have to use a special function or something to do this type of mapping ( mapping from header level towards item level ) ?
I tried already some things with the functions 'Remove context' and 'CollapseContext' but this does not seem to help.
Every help is welcome,

Hi,
Here you will be passing some values from Header Segments to Item level. So definately there should be a link available between them to pass the appropriate values..
For multiple Item fields you need to use the single header fileds as common
you should go for UseOneToMany API in Node function
Header field to be passed --------->
(Update table for Item level) ITem Node -------> UseOneToMany -----> splitByValue -------> Target field
(Update table for Item level) ITem Node ------->
Thanks
swarup

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I'm using the standard message type HRMD_A with IDOC base type HRMD_A06 and the function module IDOC_INPUT_HRMD.
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Hi,
In a mapping I want to do that:
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Segment1-fieldB
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Regards.
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Message was edited by: Mickael Huchet
Message was edited by: Mickael Huchet

Hi Mickael,
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 </SEGMENT1>
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 <FIELD_D>DataD</FIELD_D>
 </SEGMENT2>
</DATA>
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Message was edited by: Peter Jarsunek

Hi,
I saw the weblog, but I think more important is the 'XI in action' mentioned in this one..
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Message was edited by: Peter Jarsunek

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Hi Pradeep,
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Ref link
http://help.sap.com/saphelp_nw04/helpdata/en/14/80243b4a66ae0ce10000000a11402f/frameset.htm
2)Message Types
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Follow these Ref Link for all answers...
http://help.sap.com/saphelp_nw04/helpdata/en/14/80243b4a66ae0ce10000000a11402f/frameset.htm
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Why do we create message types (we81)?

Hi Guys,
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thanking u...
regards..

hi
good
A message type comprises a data type that describes the structure of a message. At the following points in SAP Exchange Infrastructure you can refer to the message to be exchanged at runtime by using the message type:
· More than one message interface can use the same message type. For example, an asynchronous outbound message interface and an asynchronous inbound message interface can reference the same message type because the request message does not need to be mapped.
· When defining a message mapping you can directly reference message types to map messages from an outbound interface to messages from a receiver interface.
http://help.sap.com/saphelp_nw04/helpdata/en/2d/c0633c3a892251e10000000a114084/content.htm
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Why need message type when u create data type...

why need message type when u create data type...

Hi,
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PS : reward points if helpful

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hi all ,
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*ques*
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Hi
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It looks like this...
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