# Provide the RPC ID When Contacting Support to Troubleshoot an Error

The response of each RPC call contains the `rpc-id` field, which identifies the method execution in Salesforce. Salesforce Customer Support uses the `rpc-id` value to aid in troubleshooting issues with an RPC call. If a call fails, the returned exception includes the `rpc-id` field. For more information, see [Handle Errors](/docs/platform/pub-sub-api/guide/handling-errors.md).

Even if a call is successful and returns a successful response, there can be issues, for example, slow performance in event publishing or delivery. If you determine that the issue doesn’t originate from your code and you contact Salesforce Customer Support for help, provide the `rpc-id` value from the response.

**See Also**

- [Handle Errors](/docs/platform/pub-sub-api/guide/handling-errors.md)
- [Generate a Client Trace ID to Troubleshoot Non-Pub/Sub API Errors](/docs/platform/pub-sub-api/guide/client-trace-id.md)