1# Policy 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## 2100001 Invalid Parameters 8 9**Error Information** 10 11Invalid parameter value. 12 13**Description** 14 15This error code is reported if any input parameter value is incorrect. 16 17**Possible Causes** 18 19The end time is earlier than the start time. 20 21**Solution** 22 23Check whether the start time and end time are properly set. 24 25 26## 2100002 Service Connection Failure 27 28**Error Information** 29 30Operation failed. Cannot connect to service. 31 32**Description** 33 34This error code is reported if a service connection failure occurs. 35 36**Possible Causes** 37 38The service is abnormal. 39 40**Solution** 41 42Check whether system services are running properly. 43 44## 2100003 System Internal Error 45 46**Error Information** 47 48System internal error. 49 50**Description** 51 52This error code is reported if an internal system error occurs. 53 54**Possible Causes** 55 561. The memory is abnormal. 57 582. A null pointer is present. 59 60**Solution** 61 621. Check whether the memory space is sufficient. If not, clear the memory and try again. 63 642. Check whether the system is normal. If not, try again later or restart the device. 65