Error Message External Mapping Not Complete Yet

Question

Hi,
I have the following scenario.
Component A <b>is Embedding</b> Component B.
Component B has a Componenet Controller that makes a<b> Service Call</b> to a Function Module.
The <b>Top Node in the Context of Component Controller of Component B (</b>which is same as the name of the function module being called) is marked with :
<b>Interface Node = 'X'
isInputElement = 'X'.</b>
The IMPORTING Node gets the isInputElement = 'X' property.b The CHANGING node does not.
The Context of COmponent Controller of B looks like
    Context
        Name_of_Function_Module
           IMPORTING
               Attribute1
           CHANGING
              Attribute2
<b>Now in Component A, in the Component Usage of B-> Interface Controller , I declare the Usage of Component Controller of Component A</b>
I did the external mapping of the Top Node of Component B(throught the interface controller) to that of Component Controller of A.
I created a View in Component A, declared usage of Component Controller of A in this View, did context mapping from View Controller of A to Component Controller of A and binded the IMPORTING node attributes to the Inputfield.
I made sure I instantiate the Used COmponent B in the WDDOINIT() method of the COmponent Controller of A
WHen I run the application I get the error
<b>External Mapping for COMPONENT A # Name_of_Function_Module.IMPORTING.Attribute1 Not Complete Yet</b>
What am I missing here?
Thanks
Message was edited by:
        SAP  User

Answer 1

Thanks Regina,
In my case, I have to have the IMPORTING Node and NAME_OF_FUNC_MODULE node as isInputElement = 'X' because the values for the Importing parameters comes from the outer component .
The <b>CHANGING</b> Node<b> does not</b> have isInputElement = 'X' because the data flow is from the Imterface Controller of Component B to the Component Controller of Component A.
The problem was that I had wrongly marked the Node for Component Controller of Component A, which is mapped to the View COntroller of A, as isInputElement = 'X'. I removed that and it worked fine..
In a nut shell, the followiing holds true for External Mapping
1) The SOURCE of data is ALWAYS from outer Component to Inner Component, that is for Eg: from the COmponent Controller of Component A to the Interface Controller of COmponent B, if A Embeds B
2) The Controller Usage of Component A has to be declarred withing that of the Interface Controller of B (and not the other way..THIS IS IMPORTANT, since the source of data is the Component Controller of A, so B has to Use A and not Vice-Versa)
3) The Source of data for Nodes with isInputElement <b>=</b> 'X' is always the COmponent Controller (or Custom COntroller) of the OUTER Component, while that with isInputElement <b>NOT EQUAL</b> 'X' is the Interface Controller of the INNER Component
Regina, Pls input ur comments