Converge boundary flagging issue
 

Hi.I am trying to simulate flow over an airfoil using Converge. I want to analyse the lift and drag forces for different angle of attacks. So i gave a rotation to the airfoil but i keep getting an error about the stationary triangles being attached to non translating moving triangles, which i have tried hard to look up on the internet but to no avail.If someone could point me in a direction , would be a great help.The error window image is attached.