https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Revit-Error-Can-t-...
Dear Autodesk!
This is not a solution to the problem, but a way out, as the program does not provide the necessary tools for the job. And the provided tools do not work the way the user needs them to.
You show additional steps how to get out of a situation when your program simply cannot understand how to work correctly. And instead of fixing and rewriting the code, you make people copy and paste the sketch. And at the same time you say that no errors have been found and the program works as it should. No. It's a bad idea if thousands of people complain about what you've done.
It's the same situation with toposurfaces and toposolids, only there is no such way out. The program is just buggy, and incomprehensible to the architecore. I have no way to model a simple contour, pick up one part and cut from toposolid . It's always random, the program can not be relied on, it just when you change the height of a point by 10mm can say that now it does not want to connect. It's a failure. It's impossible to work with. Instead of me designing the way I want, I'm looking for the position of the elements to please the revit. Not the customer.
Thousands of people are asking you to do this, make quality software and people will pay for it, not crack for free).