Bus and model variants

Hello,

I used to have a variant subsystem and wanted to change to model variant to avoid compiling again and again some parts of the system. So I replace the "Variant Subsystem" block by a "Model Variants" and put all the variants in differents files. But there are bus...

I have data type problems between variants and the root model which contain the "Model variants" block. I looked on this page but I don't understand how to get it done in my case.

I can't specify each signal in the bus : too many bus and some of them are bus of bus...

I can create a bus using :

Simulink.Bus.createObject(myVariant,myOutport)

But then, the bus doesn't have any Elements. So, there is still an error.

I tried :

myBus = Simulink.Bus.createObject(myVariant,myBusCreatorBlock)

But then, in the Outport, the specification isn't "Bus:myBus" but I must select "Bus:slBus1", "slBus1" is "myBus.busName".

This question almost solve my problem, but he use two MAT files which contain Bus definition (including all signals names) that I haven't and can't have.

So, my question is : How to create a nonvirtual bus, without specifying all of his elements manually ?