# Display Error Codes

> **NOTE**
>
> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](errorcode-universal.md).

## 1400001 Invalid Display or Screen
**Error Message**

Invalid display or screen.

**Description**

This error code is reported when an invalid display, including a virtual screen, is operated.

**Possible Causes**
1. The virtual screen has not been created.
2. The virtual screen has been destroyed.

**Solution**

1. Before operating the virtual screen, check whether the virtual screen has been created.
2. Check whether the virtual screen has been destroyed.

## 1400002 Unauthorized Operation
**Error Message**

Unauthorized operation.

**Description**

This error code is reported when the API does not have the required permissions to operate an object.

**Possible Causes**

The virtual screen object of another process is operated.

**Solution**

Check whether unauthorized operations are performed on the object of another process. If yes, delete the operations.

## 1400003 Abnormal Display Manager Service
**Error Message**

This display manager service works abnormally.

**Description**

This error code is reported when the display manager service is abnormal.

**Possible Causes**

1. The display manager service is not started normally.
2. The bottom-layer graphics synthesis and rendering are abnormal.

**Solution**

Try again later or restart the device.