1# backgroundProcessManager 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## 31800002 Invalid Parameter 8 9**Error Message** 10 11Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. PowerSaveMode status is out of range. 12 13**Description** 14 15Invalid parameter. 16 17**Possible Causes** 18 191. The number of parameters is incorrect. 202. The parameter type is incorrect. 213. The parameter value is out of range. 22 23**Solution** 24 25Make sure all the mandatory parameters are passed in and the parameter types are valid. If parameter verification fails, read the parameter specifications and locate the fault based on the possible causes. 26 27## 31800003 Setting Overriden by Task Manager 28 29**Error Message** 30 31Setup error, This setting is overridden by setting in Task Manager. 32 33**Description** 34 35The setting fails because it has already been configured by the Task Manager. 36 37**Possible Causes** 38 39The setting has been configured by the Task Manager. The priority of the parameters set by the Task Manager is higher than that of the application. 40 41**Solution** 42 43Use the Task Manager to set the parameters. 44 45## 31800004 Setting Failure Due to System Scheduling 46 47**Error Message** 48 49The setting failed due to system scheduling reasons. 50 51**Description** 52 53The setting fails due to system scheduling. 54 55**Possible Causes** 56 57The system scheduling is performed. 58 59**Solution** 60 61Perform the setting again. 62