Hi Karthi
Follow the steps
1. Create a Model Node and do Model Binding with the Input structure of the Bapi. Also create a node and an attribute within and bind it to a UI element DropDownByIndex on the View's layout.
2. Create an instance of BAPI input structure and all the structures within the input structure which contain the input parameters.
3. Set the Input parameters to the input structure or structures within the input structure (if any).
4. Add the all sub-structures used within input structure to the parent structure (if any).
5. Bind the instance of Input structure to the Model Node.
6. Execute the Model Node.
7. Invalidate the Output Node within the Model Node.
8. Get all values from the nodes within model nodes as part of output structure by using for loop up to the node size and accessing each element by incremental index.
9. Create an element of the drop down node and set the retrieved value from your node within output node what you got in the previous step. Now add this element to the Drop Down node
Regards,
Tushar Sinha
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