# S03001 {#s03001}

## Error Code {#error_code .section}

S03001

## Error Message {#error_message .section}

`The engine 'xxx' already exists. Choose another name or release the existing engine using 'dropStreamEngine()'. RefId: S03001`

## Probable Causes {#probable_causes .section}

The name of DolphinDB streaming engines must be unique. This error may occur when:

-   A name is used for creating multiple streaming engines.

-   The existing engine with the same name is not released.


## Solutions {#solutions .section}

-   Choose another name for the newly created streaming engine.

-   Release the existing streaming engine with the same name before creating a new one.


**Parent topic:**[Error Code Reference](../../Troubleshooting/ErrorCode.md)

