Adina systems : ***INPUT ERROR: No node found in BCD X

This is my first Mechanical Engineering Post !

I was working with Adina systems FEM software performing a FSI simulation (Fluid Structure Interaction).
I received ' ***INPUT ERROR: No node found in BCD 1' when tried to generate the DATA file.

After some R&D I found that this error occurs when you've defined the FSI Boundary on wrong body ( e.g. Solid body instead of Fluid one )