# Waitlist Participants (PATCH)

Contains the error codes and error code messages related with Salesforce Scheduler API for the `waitlist/participants` (PATCH) resource.

This table lists HTTP response code descriptions that are unique to this resource.

| HTTP Response Code | Error Code             | Description                                                                                                                                                                                                                                                     |
| ------------------ | ---------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 400                | `API_DISABLED_FOR_ORG` | The Drop In Appointments setting isn't enabled in your org. Ask your Salesforce admin to enable the setting.                                                                                                                                                    |
| 400                | `INSUFFICIENT_ACCESS`  | The calling user doesn't have access to Lobby Management. Assign a lobby management permission set, such as Facility Manager or Queue Manager, to the user.                                                                                                     |
| 400                | `INVALID_API_INPUT`    | One of: `waitlistParticipantId` is missing or empty; `waitlistParticipantId` doesn't match a waitlist participant whose `Status` is `Unassigned`; `targetPosition` is missing; `targetPosition` is `0`, a negative value other than `-1`, or otherwise invalid. |
| 400                | `JSON_PARSER_ERROR`    | The `targetPosition` value isn't a number, or the value is outside the signed 32-bit integer range.                                                                                                                                                             |
| 405                | `METHOD_NOT_ALLOWED`   | The request used an HTTP method other than `PATCH`.                                                                                                                                                                                                             |