1# Display Error Codes 2 3> **NOTE** 4> 5> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](errorcode-universal.md). 6 7## 1400001 Invalid Display or Screen 8**Error Message** 9 10Invalid display or screen. 11 12**Description** 13 14This error code is reported when an invalid display, including a virtual screen, is operated. 15 16**Possible Causes** 171. The virtual screen has not been created. 182. The virtual screen has been destroyed. 19 20**Solution** 21 221. Before operating the virtual screen, check whether the virtual screen has been created. 232. Check whether the virtual screen has been destroyed. 24 25## 1400002 Unauthorized Operation 26**Error Message** 27 28Unauthorized operation. 29 30**Description** 31 32This error code is reported when the API does not have the required permissions to operate an object. 33 34**Possible Causes** 35 36The virtual screen object of another process is operated. 37 38**Solution** 39 40Check whether unauthorized operations are performed on the object of another process. If yes, delete the operations. 41 42## 1400003 Abnormal Display Manager Service 43**Error Message** 44 45This display manager service works abnormally. 46 47**Description** 48 49This error code is reported when the display manager service is abnormal. 50 51**Possible Causes** 52 531. The display manager service is not started normally. 542. The bottom-layer graphics synthesis and rendering are abnormal. 55 56**Solution** 57 58Try again later or restart the device.