@GopalP25 Hi Gopal,

Whenever you change the configuration in Context Dictionary, most of the NBA Designer rules would become invalid. To avoid running into issues, we trigger an NBA Designer regeneration to re-generate all rules and that is the reason you are observing the "Regeneration screen" in place of Taxonomy. This is a mandatory thing and cannot be avoided.

Let me clarify on few things you mentioned

i)Issue/Group deletion: Deleting Issue/Group from Hierarchy landing page wouldn't have an effect on NBAD Regeneration here, so, that is not a valid workaround, and refrain from doing it. I would advise adding those issues/groups back to avoid further complications.

ii) Taxonomy deletion: Why would you want to delete Taxonomy ?, I understand that it has errored out, but, deleting existing Taxonomy -> applying a new Template is not the best solution. Deleting Taxonomy wouldn't delete all back-end rules and you may face similar issues again once you apply the new template. 

iii) Root cause: You can see that few strategies have failed during regeneration. Once you click on "ERROR", it should fire a modal dialog with an error message and most likely mention the root cause too. Please share it with us for each individual error.

iv) Extension points: Usually, extension points like you mentioned shouldn't cause any issues with the errors you posted. I don't think your extensions are the root cause for this issue. You can add them back if you need them for futuristic purposes

Next steps: As I mentioned in the root cause, please share with us the error messages for each individual strategy failure (screenshot or text). We can guide you based on that.

Let me know if you need anything else. 

-Deepak