Revit 2019 cannot open modeling

[aRcHiTeCt.JM]

This message appears when I try to open this project in Revit 2019:

The project was created and it opens with no problem in Revit 2018 as follows:

I have tried to delete almost all families and I have been purging it and saving it every time, but always same message.

Anyone knows what is happening ?

[barthbradley]

Try auditing. 

https://knowledge.autodesk.com/support/revit-products/getting-started/caas/CloudHelp/cloudhelp/2017/...

[aRcHiTeCt.JM · Accepted solution]

.... welll the only way to save the project was going 3d and copying the entire scene

... after that create a new template and pasted the project

... rename levels adjust everything 

... and done

[barthbradley]

ALAS; a solution has been found!!!  I've been on pins and needles for months, waiting for a solution to be accepted by the OP.  

Congratulations, @aRcHiTeCt.JM.  You did it!  

[aRcHiTeCt.JM]

---

@barthbradley wrote:

ALAS; a solution has been found!!!  I've been on pins and needles for months, waiting for a solution to be accepted by the OP.  

Congratulations, @aRcHiTeCt.JM.  You did it!  

---

..... thank you