In order for grids to import as one grid system, all x grids (and y grids) need to be exactly parallel to each other and the grids in the opposite must be perfectly orthogonal. If one or more grids are slightly skewed, then the grids will import as a…

We have seen a few models recently that produced the same error. Very small coordinate discrepancies between beam ends and supporting columns and walls are associated with the problem. In some cases, the coordinate difference is less than 0.0001 in and…