1# AVSession Management 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## 6600101 Session Service Exception 8 9**Error Message** 10 11Session service exception. 12 13**Description** 14 15The session service is abnormal, and the application cannot obtain a response from the session service. For example, the session service is not running or the communication with the session service fails. 16 17**Possible Causes** 18 19The session service is killed during session restart. 20 21**Solution** 22 231. The system retries the operation automatically. If the error persists for 3 seconds or more, stop the operation on the session or controller. 24 252. Destroy the current session or session controller and re-create it. If the re-creation fails, stop the operation on the session. 26 27## 6600102 Session Does Not Exist 28 29**Error Message** 30 31The session does not exist. 32 33**Description** 34 35Parameters are set for or commands are sent to the session that does not exist. 36 37**Possible Causes** 38 39The session has been destroyed, and no session record exists on the server. 40 41**Solution** 42 431. If the error occurs on the application, re-create the session. If the error occurs on Media Controller, stop sending query or control commands to the session. 44 452. If the error occurs on the session service, query the current session record and pass the correct session ID when creating the controller. 46 47## 6600103 Session Controller Does Not Exist 48 49**Error Message** 50 51The session controller does not exist. 52 53**Description** 54 55A control command or an event is sent to the controller that does not exist. 56 57**Possible Causes** 58 59The controller has been destroyed. 60 61**Solution** 62 63Query the session record and create the corresponding controller. 64 65## 6600104 Remote Session Connection Failure 66 67**Error Message** 68 69The remote session connection failed. 70 71**Description** 72 73The communication between the local session and the remote session fails. 74 75**Possible Causes** 76 77The communication between devices is interrupted. 78 79**Solution** 80 81Stop sending control commands to the session. Subscribe to output device changes, and resume the sending when the output device is changed. 82 83## 6600105 Invalid Session Command 84 85**Error Message** 86 87Invalid session command. 88 89**Description** 90 91The control command or event sent to the session is not supported. 92 93**Possible Causes** 94 95The session does not support this command. 96 97**Solution** 98 99Stop sending the command or event. Query the commands supported by the session, and send a command supported. 100 101## 6600106 Session Not Activated 102 103**Error Message** 104 105The session is not activated. 106 107**Description** 108 109A control command or event is sent to the session that is not activated. 110 111**Possible Causes** 112 113The session is in the inactive state. 114 115**Solution** 116 117Stop sending the command or event. Subscribe to the session activation status, and resume the sending when the session is activated. 118 119## 6600107 Too Many Commands or Events 120 121**Error Message** 122 123Too many commands or events. 124 125**Description** 126 127The session client sends too many messages or commands to the server in a period of time, causing the server to be overloaded. 128 129**Possible Causes** 130 131The server is overloaded with messages or events. 132 133**Solution** 134 135Control the frequency of sending commands or events. 136