access an interface node : the mapping has not been completed

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Hello all,

by getting an element of interface-node within a component I get follow error message

"the mapping to node COMPONENTCONTROLLER.1.INIT_DATA" has not been completed"

Can anybody say me, what does it mean?

Some more information (in case for somebody need it):

1. I have a component A, where I have defined usage component of component B.

2. Component B has an interface node INIT_DATA, which is mapped with the node INIT_DATA of component A.

3. I set attributes of node INIT_DATA of component A and expect, that those values will be assigned to the node INIT_DATA of component B (becouse they are mapped)

4. by doing it within a component A:

lo_node = wd_context->get_child_node( name = if_componentcontroller->wdctx=>init_data).

lo_elem->get_element( ).

lo_elem->set_attribute(....).

I get this error message:

"the mapping to node COMPONENTCONTROLLER.1.INIT_DATA" has not been completed"

Please let me know, what I do wrong?

thanks in advance

Anna