Revit 2018.3 error

[Julian.Gherda]

Hi all. I need your help figuring out why I've got the following error and what does it mean. In our team nobody knows what it is, nobody knows where it came from. The same error popped-up first time when I was editing a slab extent and clicked on finish editing button and the second time when I was syncing.

Thanks in advance to all who will spend time reading this and I'm looking forward to your responses.

[Juanfranciscoangel]

hello did you solve the problem if so you can comment

[Julian.Gherda]

Hey and thanks for your reply. I haven't found the reason for that warning. It's just something I got used to but I will say it hasn't come up lately.