Cells containing mesh elements were not being prioritized correctly via a Microstation pen table. The data contained 2d and 3d elements. I don't believe the problem was related to the mesh elements, but rather the 2d/3d mixed data. Using Microstation V8i.
You need to do two things:1) In the Pen Table, under the Pen Table Options (in the lower left corner), turn on "Non-rasterized priority sort mode" and save the pen table.2) In the Display style (under Settings Display Styles), select Wireframe and turn on "Use File Order for Display". Be sure to Save Settings on your dgn to save these settings.For further information concerning priorities, see the blog below on the BE Communities:http://communities.bentley.com/blogs/andrew_edges_blog/archive/2008/06/18/Pen-Table-Priority.aspx