Thank you for your answer.nI hope that I understand your idea right, so I sum up what I have done.nFirst I have turned on beta options.nThen I have turned on small sliding:nI left larged deflection turned off.nAnd as Exclusion Regoin I have choosen Geometry selection and selected the following edges:nWhen I run the topology optimization I get follwoing message:nIf I look at the outpu data file of the topology optimization I get the same message again as before:n *** ERROR ***n Nonlinear contact in combination with thermal load is not supported.nnIf I have misunderstood your suggest, please do enlighten me.nIf you have any further idea I would be happy if you would tell it to me.nnThank you and best regards.nnbokaJ