ASSISTANT does not search the file and tool_choice parameter cannot solve it

The tool_choice parameter is part of the new features of the Assistant API, designed to make the model search the file before responding. However, when I set tool_choice to “required,” the model consistently refuses to search the file before responding. Occasionally, it works as expected, but most of the time, it does not. Can anyone help me with this issue? Specifically, how can I ensure the Assistant always searches the file whenever there is an input? Thank you for your assistance.

Hello, I encountered the same problem. Have you solved it?