1# WebSocket 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## 2302001 WebSocket URL Error
8
9**Error Message**
10
11Websocket url error.
12
13**Description**
14
15This error code is reported if the WebSocket URL is incorrect.
16
17**Possible Causes**
18
19The WebSocket URL is incorrect.
20
21## 2302002 WebSocket Certificate Does Not Exist
22
23**Error Message**
24
25Websocket certificate file does not exist.
26
27**Description**
28
29The WebSocket certificate does not exist.
30
31**Possible Causes**
32
33The certificate path is incorrect or no certificate is configured.
34
35## 2302003 WebSocket Connection Already Exists
36
37**Error Message**
38
39Websocket connection already exists.
40
41**Description**
42
43The WebSocket connection already exists.
44
45**Possible Causes**
46
47The WebSocket connection has been established.
48
49## 2302998 Domain Access Denied
50
51**Error Message**
52
53It is not allowed to access this domain.
54
55**Description**
56
57This error code is reported if access to a certain domain is prohibited.
58
59**Possible Causes**
60
61An incorrect server domain name is configured for the atomic service.
62
63**Solution**
64
65Configure a correct server domain name for the atomic service. For details, see [Network Connection Management](https://developer.huawei.com/consumer/en/doc/atomic-guides-V5/atomic-net-connection-manager-V5).
66
67## 2302999 Unknown WebSocket Errors
68
69**Error Message**
70
71Websocket other unknown error.
72
73**Description**
74
75This error code is reported if other unknown WebSocket errors occur.
76
77**Possible Causes**
78
79Other system faults occur.
80
81**Solution**
82
83Contact technical support.