Filling dynpro fields from a subscreen

Hi,

I am trying to return values from a value request (F4) into respective fields on a dynpro without PBO. This works fine via function 'DYNP_VALUES_UPDATE', but fails when the value request originates from a subscreen of the dynpro (tab strip).

The parameters dyname and dynumb of the function are never evaluated!

Any suggestions how to access the dynpro fields of the affiliate main dynpro?

TIA

Peter