Do you mean the automatic infill wall created when you demo a door in an existing wall? If so, turn on the hidden objects and see if someone manually overrode them to be hidden.

Or check your phase filter settings. Be sure you are in "Show Complete" and "New Construction"

Otherwise, you need to try "Show All" from a "New Construction" in case you demolished a "New Construction" object in the "New Construction" phase.

Yeah, this is way more messed up than that. Not hidden, and it's not a phase filter or settings issue. . .that I can find at least.

Example.

I have an existing wall and new walls

In my new plan, existing walls are showing 1/2 toned and new walls are showing black. Phase is set to new construction and filters are set to show new and previous.

In my existing plan, my walls are showing black. Phase is set to existing and filter is set to complete.

So far so good.

NOW

In my new plan I create a new door in an existing wall and the door shows black.

But when I switch to my existing plan, instead of keeping the wall in place, it removes it as if it was never there. And if I check my demo plan, it doesn's show the existing infill wall to be demo'd either. Demo plan shows anything that I actually use the "Demo Tool" on, but no the infill that a newly placed door demos.

It's almost as if I have a project that is telling revit to not create the infill in an existing wall when a new door is placed.

On the flip side, if I demo an existing door, it DOES creat the new infill that shows on the new plan.

This might be stupid.
But are you sure that the door is going into an existing wall and not a new wall. Also are you creating the door during new or existing phase?
Phases can be tricky.
Just a tip as to how we use phasing in our office.
We always view everything in the NOW. and then i just apply phase filters for the different effects I want on drawings. We have a concistent display for existing, new and demo and they will stay that way no matter what phase we look at them. Existing always thinner and lighter (overide), Demo always light and dashed(overide) and new always by default.

This might be totaly useless to you, but I had to go find one of my users's doors the other day and found it that they had duplicate walls, Recreating the existing wall in the new phase each time. This can give revit a hickup or two.

Feel free to post the wall section with door for us to takew a look at.

Cheers

GAFFFFF!!!

Got it, someone went in and messed with a bunch of worksets, and then turned them off in different views. . . . .grrrrrrrrr