I faced a problem in 3D flux simulation 
   	when I define an air region between the fixed part and rotating part as compressible I face the below error 
   	Remeshing of Mecha. Sets impossible on the current time step 
   	Remeshing of Mecha. Sets impossible on the previous time step 
   	before solve i cheeked physics and there is no problem and all thing is ok. 
   	please guide me. 
   	regards