Webdynpro: Reading attribute of one component in another WD component

Hi All,
This is a scenario in the SAP SRM system.
I am trying to access the Contract number attribute (V_CTR_H_BD.HEADER_BD.OBJECT_ID) from the webdynpro component /SAPSRM/WDC_CTR_DODC_H_BD.
I want that attribute to be accessed in the WD component /SAPSRM/WDC_DODC_CND view V_DODC_CONDITION.
So, in order to achieve the above requirement, I tried to add a node as an Interface Node in the webdynpro component /SAPSRM/WDC_CTR_DODC_H_BD. But, I am unable to create any node in the component controller of WD component /SAPSRM/WDC_CTR_DODC_H_BD as a Interface Node, and hence, I am unable to create any node of Interface Controller. This is due to the reason that the node that we are creating have the Interface Node option in disable state.
Can anybody suggest what approach we need to follow to satisfy the above requirement? (It would be great if the resolution will be containing the steps)
Regards,
Susanta

Hello,
this is the scenario.
I could populate the account name in location field now. I do have partnerno. however, i am not able to retrieve the account number. is it possible to retrieve account number by get_related_entity when i have name. If yes, please share the piece of code that has to written. I am also doubtful about where to write it. Currently i am writing code to get account name in GET_ACT_LOCATION.
More details :
I need to populate the address here.
Component - BT126H_APPT
view-BT126H_APPT/ApptDetails
Node- BTACTIVITYH Base Entity BTActivityH
attribute- STRUCT.ACT_LOCATION
details about the name i am getting curently
Component - BT126H_APPT
view-BT126H_APPT/ApptDetails
Node-BTPARTNERACCOUNT Base Entity BTPartner
attribute-PARTNERNO
Kindly tell me can i get the partnernumber from this node anyhow. if yes, please explain.
REGARDS
CHANDRAKANT

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