1# DRM 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## 24700101 Unknown Error 8 9**Error Message** 10 11Unknown error. 12 13**Description** 14 15An unknown error occurs. 16 17**Possible Causes** 18 19The input parameter format or data type is incorrect. As a result, data fails to be obtained or converted. 20 21**Procedure** 22 23Obtain the exception description, check the system error logs, and rectify the fault based on the exception description and error description in the logs. 24 25## 24700103 Too Many MediaKeySystem Instances 26 27**Error Message** 28 29Too many MediaKeySystem instances. 30 31**Description** 32 33The number of **MediaKeySystem** instances reaches the upper limit (64). 34 35**Possible Causes** 36 37Invalid **MediaKeySystem** instances are not released in time. 38 39**Procedure** 40 41Release **MediaKeySystem** instances that are no longer used. 42 43## 24700104 Too Many MediaKeySession Instances 44 45**Error Message** 46 47Too many MediaKeySession instances. 48 49**Description** 50 51The number of **MediaKeySession** instances reaches the upper limit (64). 52 53**Possible Causes** 54 55Invalid **MediaKeySession** instances are not released in time. 56 57**Procedure** 58 59Release **MediaKeySession** instances that are no longer used. 60 61## 24700201 Service Error 62 63**Error Message** 64 65Service error. For example, the service crashed. 66 67**Description** 68 69A DRM service error occurs. 70 71**Possible Causes** 72 731. An error occurs during the DRM solution plugin execution. 74 752. DRM services are suspended. 76 77**Procedure** 78 79Obtain the exception description, check the system error logs, and rectify the fault based on the exception description and error description in the logs. 80