Can't associate in case of "CrossDeploymentUnit"

Question

Dear Experts
I declare two "associut "SupplierInvoice" BO cannot declare in normal way. It shows an error.
(My DeploymentUnit is "FOUNDATION")
So I declare it with "CrossDeploymentUnit". The error is corrected.
But , I can't find "N_SInvoicing" association in Form Wizard of LC Designer .
In case of using a "CrossDeploymentUnit", I can't associate it. Is my understanding correct?
If the above case is correct, do you know a workaround?
Please give me some advice...
Best regards,
Ryota Ichida

Answer 1

Hell Ryota,
Your solution is placed in the "Foundation" layer ( = DeplyomentUnit). This is the basic layer below any other layer.
Now you define an association to the BO SupplierInvoice from the DeploymentUnit "SupplierInvoicing", which is a layer above the Foundation.
Technically it is possible to replace the "SupplierInvoicing" by another deployed entity which may or may not contain the BO SupplierInvocice. Therefore you need to define the association as "CrossDeploymentUnit" and it can be read (please check before via IsInitial() ) but not written.
In general it makes sense to place your objects in the same layer as the other object you access.
This is even possible for distinct BO via the annotation "DeplyomentUnit".
E.g.:
[DeploymentUnit(SupplierInvoicing)] businessobject AMA {
HTH,
   Horst