As I have seen you made your flowchart drawing direct into Layout 2.
In such a case I'll save the Layout as an independent .dwg file ant then insert into a Revit Drafting View.
- in AutoCAD > Layout 2 > Save As - do not click , just hoaver over the comand with the mouse> choose Save Layout as Drawing
- Open the new created .dwg file and scale it , because Revit does not accept too short segments - Save again
- in Revit , into a Drafting View , insert the .dwg file.
Have a look at my screencast.
https://knowledge.autodesk.com/community/screencast/94dc604f-f621-4c08-9e1c-751c54b2aca4
Constantin Stroescu
