# Y (Market Data Request Reject)

The FIX message **`Y` (Market Data Request Reject)** is used to reject the [**`V` (Market Data Request)**](/docs/guides/exchange-fix-api/market-data-fix-api/supported-fix-messages/fix-application-level-messages/message-v-market-data-request) message.

Reception of this message indicates a mistake in the [**`V` (Market Data Request)**](/docs/guides/exchange-fix-api/market-data-fix-api/supported-fix-messages/fix-application-level-messages/message-v-market-data-request) message, and helps troubleshoot the specific problem causing the rejection.

| Tag       | Name               | Type       | Required                                                           | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| --------- | ------------------ | ---------- | ------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **262**   | `MDReqID`          | `String`   | **yes**                                                            | Unique identifier of the subscription provided with the [**`V` (Market Data)**](/docs/guides/exchange-fix-api/market-data-fix-api/supported-fix-messages/fix-application-level-messages/message-v-market-data-request) request.                                                                                                                                                                                                                                                                                                     |
| **281**   | `MDReqRejReason`   | `Char`     | **yes, by Revolut FIX Gateway**                                    | Reason for the rejection of a [**`V` (Market Data)**](/docs/guides/exchange-fix-api/market-data-fix-api/supported-fix-messages/fix-application-level-messages/message-v-market-data-request) request. <br/><br/>Supported values: <br/><ul><li> `0` - Unknown symbol</li><li> `1` - Duplicate **262** `MDReqID`</li><li> `4` - Unsupported **263** `SubscriptionRequestType`</li><li> `5` - Unsupported **264** `MarketDepth`</li><li> `8` - Unsupported **269** `MDEntryType`</li><li> `y` - Unknown **262** `MDReqID`</li></ul>   |

For more details, see [`FIX 4.4 : Market Data Request Reject <Y> message` in the FIX 4.4 documentation](https://www.onixs.biz/fix-dictionary/4.4/msgType_Y_89.html).