dynamic mesh + boundary layer cells
 

Hi,

I'm using a simple udf for defining a prescribed motion for a rigid body with a boundary face zone moving with it. I want them move together, so i assigned the udf (compiled) to both. The problem is that i receive a bad message from fluent:

FLUENT received fatal signal...

If i assign the cg motion to the body only, it works, but the mesh not to good that case...

Can anybody guess my mistake???

many thanks