Files with x-refs open very slow

Hi

 

In our office we try to use DraftSight (used to work with aCadLT) on both mac and windows platforms. 

We are experiencing very slow open times (10 - 15 minutes) for files with one or more x-refs. As soon as we bind the x-refs to a file, it opens fast again. Can you help us to reduce the time to open those files

I have attatched A-46.4-003.dwg (and related X-refs) as a really bad example.

The solution of this problem is essential for our implementation af DraftSight.

Thank You

/Morten