An error occurred in this call: unknown-error
# supportr
Reaz
04/01/2025, 3:21 AMWe did a call to about 20 calls and 99% are getting unknown error. Call ID: 242ee19e-4466-44c0-9e8a-45307a5948dc
v
Vapi Support Bot
04/01/2025, 3:23 AMHi there! I see you're experiencing an "unknown-error" in 99% of your calls. That's definitely frustrating! 👀
I'm unable to determine the exact cause for your specific Call ID without access to the actual logs. However, I can help explain what this error means and provide troubleshooting steps.
Based on the information I found, "unknown-error" in Vapi can occur for several reasons:
1. **Concurrency Limits**: You might be hitting your concurrency limit for outbound calls. According to [information I found](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336054616206348479), reaching this limit can cause calls to have an 'unknown' status in call logs.
2. **Twilio and Websocket Issues**: The error can occur when "Twilio isn't sending the websocket" especially for unanswered or hung-up calls, as noted in [this source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336407849806462976).
3. **System Outages**: According to [this information](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334279837581443215), system outages can result in calls ending without the reason being updated correctly.
4. **11labs Model Issues**: If you're using 11labs, the "flash_model" might be causing the error. [This source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1335277468805758986) suggests changing the model to "turbo" might help.
Here are some troubleshooting steps:
1. **Check Concurrency Limits**: Review your application to ensure it's not making more simultaneous calls than your plan permits.
2. **Verify SIP Configuration**: If applicable, ensure your SIP URI is correctly formatted and your network allows SIP protocol traffic.
3. **Investigate External Service Integration**: If you're using Twilio or 11Labs, check their configuration.
Vapi Support Bot
04/01/2025, 3:23 AM4. **Use the Call ID for Investigation**: You can use the Call ID you provided (242ee19e-4466-44c0-9e8a-45307a5948dc) to contact Vapi support. They can access call logs, transcripts, and system data to identify the root cause.
Would you like me to provide more specific information about any of these troubleshooting steps?
Sources:
- [Troubleshooting 'unknown-error' in Vapi calls](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1332377462805368923)
- [Possible causes of 'unknown-error' in Vapi calls](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336407849806462976)
- [Solutions for 'unknown-error' in Vapi calls](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334142600772456508)
- [How to use Call ID to investigate Vapi calls](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1339467226381684789)
k
Kings Big
04/01/2025, 7:44 PMHi Reaz, the issues have been resolved by now for you. Can you try making two or three more test calls and then let me know how it goes for you?