Grid check fails after sliding mesh calculation

Tito

Hello,

I'm setting a case with sliding meshes. After defining the mesh motion, other boundaries, grid interfaces and so on I'm saving a case file which is ready for iteration after initialization. Rechecking the grid after writing this case file passes OK but when I run it and then save it(along with the data file) again every consequent attempt of checking the grid fails because of one left handed face found.

Note that this doesn't affect the convergence (I managed to converge 2 time steps with this 'bug') but it still bothers me. The Gambit exported .msh file is read with no left handed faces, same goes for the .cas file after setting the case before iteration. Calculation though always brings that in further grid checks.

I'm using coupled explicit solver (over 530000 nodes) with 4 level multigrid FAS scheme and I can't complain about convergence assuming the computing power I have at home.

Do I have to pay attention on that assuming that convergence is achieved? If yes, any idea what might cause it?

Thank you.