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Hi community, does anyone know how to throw an exception to be user exception within the execute function when writing backend plugin?

You can - return the error object in output writer

can I do something like
def execute():
  exception_scopes.user_entry_point(execute_helper())

Are you talking about backend plugin or python flytekit

but it is a pythoninstanceTask since we handle the actual execution

Ohh you want the user side to raise exception

Yes you can raise anything, but if you want a nice error - <https://github.com/flyteorg/flytekit/blob/master/flytekit/exceptions/user.py|https://github.com/flyteorg/flytekit/blob/master/flytekit/exceptions/user.py>

If you raise system - you will see it marked as system exception in UI