Three phase transformer simulation unknown error: How do I fix it?

Hello,

I am trying to simulate the next three phase transformer. Is a 480/400 99KVA transformer with Dyn11 conection. I have done the next model with all the details of the design. I have also done two coil regions, non meshed ones for the first electromagnetic simulation and the volume defined as air winding is for the tenperature simulation will be done next to this simulation. In the picture you can see the model.

When I try to simulate the model it appears an error but it does not explain where is that error so I am wondering if somebody knows why I am getting this error. This is the error. I cant attach the project due to the size(any other way to upload it?). I would be very grateful of any help.

Thank you,

Iñigo Izaguirre