Does anyone know why I receive the following errors?

- December 13, 2020 at 10:15 pm
  
  NS1985
  Subscriber
  
  I am running a 2D DEM-DDPM case on fluent and I receive the following error after a certain point.Error at Node 0: Shear BCs not available for DEM ghost faces.nn999999: mpt_accept: warning: connection timed out after 120 secondsn0: mpt_accept: warning: connection timed out after 120 secondsn0: mpt_accept: error: accept failed: No such file or directoryn0: mpt_accept: error: accept failed: No such file or directoryn
- December 14, 2020 at 2:50 pm
  
  Rob
  Forum Moderator
  
  What wall conditions have you set? n
- December 14, 2020 at 2:55 pm
  
  DrAmine
  Ansys Employee
  
  Covered by the documented limitations of DEM at Walls: No shear stress based Wall BC.n
- January 13, 2021 at 12:08 am
  
  NS1985
  Subscriber
  
  Sorry for the late response!!!nI don't have any specified shear stress at walls. However, I don't receive the error after removing interfaces and running the model again.n

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