frequently corrupt drawing

[macleesj2]

this is something i am seeing way too often what is the solution

BTW clicking on "How to Revert to a Previous Version" is not a  link cursor changes to a mickey mouse hand but nothing happens

likewise with "Continue"

[macleesj2]

now when i do a zoom to "Fit" the drawing crashes how many times must i do it over - am i insane?