Write-back on different models

Hi experts,

We are in BPC 10 NW and need to write data in a different model than the one who is calling from.

In the case we call the package from model A to write data at the same model A we are implementing the runlogic Badi and have no problem. But the problem is when we are trying to call a package from model A to write data into a model B.

I have tried using method WRITE_BACK of interface if_ujo_write_back, but it is facing an exception.

Anyone could help us to implement this write-back?

Lots of thanks,

Javier