Hosted elements like doors and windows gone when I open file

[faraz.bolourian]

I'm having the strangest problem...every time I close my revit and re-open it later all of the hosted elements are gone from my file. If I open one of the files that was saved automatically though I can still find the hosted elements. So this time I tried opening both at the same time so I can copy the hosted elements over into my latest file instead of re-doing everything. I copied everything over, confirmed they're there, tagged them etc. I didn't have any need for the intermediate saved file now so I closed it and the second I closed it all the hosted elements disappeared again...I don't mean they're hidden or it's some kind of phasing or graphics setting, they're just GONE completely. 

Working on Revit 2020 here

[barthbradley]

Explain "Hosted Elements". 

edit...I see you referenced Doors and Windows. Define what you mean by "gone from my file". 

edit...Wait minute! You say "GONE completely". Define that. 😉  

[barthbradley]

Seriously though...that is some kind of CRAZY SH*T going on.  Maybe an Add-in is the culprit? Dunno. I'm stumped.  

[faraz.bolourian]

WOW...I just figured out what is causing the issue...there's a mechanical sheet list in the cover page that for some reason has multiple extra rows of lines in the table that aren't referencing any sheets at all. I just realized every time I delete those rows it's deleting elements associated with those rows as well. Not sure what is causing that issue but I resolve it by getting rid of that table and replacing it with detailed lines instead. 

[ToanDN]

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@faraz.bolourian wrote:

WOW...I just figured out what is causing the issue...there's a mechanical sheet list in the cover page that for some reason has multiple extra rows of lines in the table that aren't referencing any sheets at all. I just realized every time I delete those rows it's deleting elements associated with those rows as well. Not sure what is causing that issue but I resolve it by getting rid of that table and replacing it with detailed lines instead. 

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Yes when you delete schedule rows you delete actual elements.