Michael,
Thanks for responding. I'm running CA X12. The file is ACAD 2021, large, 65 acre, mixed-use Site Plan. Numerous roadways, bldg footprints, lake, park, street furniture etc. It is lots of cad line work which CA struggles with even when created in CA file format. I have successfully imported the same file, but previous revision with more bldgs.
Any advice is appreciated.
John