Dear Peter, nSo, If it is allowed in ansys, why initial information of contact tool does not work there? nOn the youtube there is a tutorial about contact of these bodies. But direction of axis intersect each other. In this case ansys contact tool working fine. nIn my case. as you see that the line element covered by shell element in same axis direction (2 axis parallel each other), for instance, the contact tool does not work and unconverted is happened initially. Is there any theoretical or ansys user description? Thank you again.nUNUR n