I have X4 and just loaded it in one of my laptops a few weeks ago, everything is good! 
except my details that I have saved in my library I bring them out in a cad detail page and they all look great Except 
when I need to edit them to work with the plan I am working on, I unblock them and some of them go Blank! 
it like they look great while they are blocked its like I have half the files when they are unblocked they go Blank? 
  
Do you have any Ideas why they go blank? I did ask this back a few years ago and I sent the files in to CA but I never heard back from them! But I have not been drawing any plans that needed Oregon details     
  
Detail Blocks in my Library go blank when they are unblocked 
  
Thank you I hope this is an easy fix!!!  
I am just learning this new Forum so I hope it works as well as the past ones!  
Darwin Skinner