----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Create Assistant]() * [Server URLs]() * [Create Phone Call]() * [Function Calling]() -----------------------------

### Answer It sounds like you're encountering a known issue where an assistant might hang up or stop progressing when attempting to call a function. This could be due to several reasons including bugs on Vapi's side or issues with receiving a response from the function call. From what you've described, it's possible that your issue is similar to those reported by other users where assistants were hanging up or waiting indefinitely during function calls. These problems were acknowledged by Vapi's team members and were attributed to issues with the system itself or with the function not returning a response as expected [(1)]() [(2)]() . While specific call IDs you've provided don't directly match any documented cases, the behavior you're experiencing aligns with these known issues. If this issue persists and significantly impacts your development process, it might be beneficial to monitor updates from Vapi or reach out directly to their team via their community channels for specific guidance on your case. Remember, ensuring that your server is correctly set up to handle function calls and respond appropriately is crucial. You might also want to review your assistant's function call setup and server URL configuration based on the guidelines provided in Vapi's documentation [(3)]() [(4)]() .

Got it. Tagging @User for additional help.