Editing Subregion deletes the topography(partially)

[saba_vaseghie]

Hi all, 

I am working on a big existing Revit file with and and I am updating a previously-created site plan/topography, etc. Every time I try to edit an existing subregion, it looks like Revit deletes some portion of the existing topography (it shows as a white area). Does anyone how to fix this problem when I am editing my subregion?  Please see the attached pictures. 

Thanks in advance!

[barthbradley]

Post the file.   

[saba_vaseghie]

Hi and Thanks for your reply.

Unfortunately I wont be able to share the file here as it does not belong to me. Can you please let me know if you can think of any possible solutions?

Thanks again!

[barthbradley]

I don't see how editing a subregion could delete an unrelated portion of its host topography. I think you are misreading what is going on.  

Can you back up to where you were at before you edited Subregion? If so, go back and then set your View Phase Filter to Show Complete and do it again.    

[saba_vaseghie]

you are right. Actually all the information of the topography is still there, it just does not show that part of the topo (The white Area) as soon as I start editing the subregion. It is not deleting any information, it is just doesn't show it. Same thing happens in the 3D view.

It is already in the complete phase. 

Thanks