1# Certificate Management Dialog Box Error Codes 2 3<!--Kit: Device Certificate Kit--> 4<!--Subsystem: Security--> 5<!--Owner: @chaceli--> 6<!--Designer: @chande--> 7<!--Tester: @zhangzhi1995--> 8<!--Adviser: @zengyawen--> 9 10> **NOTE** 11> 12> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](../errorcode-universal.md). 13 14## 29700001 Internal Error 15 16**Error Message** 17 18Internal error. Possible causes: 1. IPC communication failed; 2. Memory operation error; 3. File operation error. 19 20**Possible Causes** 21 22An internal error occurs when the API is called. 23 24**Solution** 25 26Check for and rectify the internal error. 27 28## 29700002 Operation Canceled 29 30**Error Message** 31 32The user cancels the installation operation. 33 34**Possible Causes** 35 36The user canceled the operation when the API was called. 37 38**Solution** 39 40No action is required. 41 42## 29700003 Failed to Install the Certificate 43 44**Error Message** 45 46The user install certificate failed in the certificate manager dialog, such as the certificate is in an invalid format. 47 48**Possible Causes** 49 50The certificate format is incorrect. 51 52**Solution** 53 54Check for incorrect certificate format and data. 55 56## 29700004 Operation Not Supported by the Device 57 58**Error Message** 59 60The API is not supported on this device. 61 62**Possible Causes** 63 64The API is available only for a PC application. 65 66**Solution** 67 68Ensure that the caller is running on a PC. 69 70## 29700005 Non-secure Operation 71 72**Error Message** 73 74The operation does not comply with the device security policy, such as the device does not allow users to manage the ca certificate of the global user. 75 76**Possible Causes** 77 78The device is not an enterprise device. 79 80**Solution** 81 82Call the API on an enterprise device. 83