1# backgroundTaskManager 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## 9800001 Memory Operation Failure 8 9**Error Message** 10 11Memory operation failed. 12 13**Possible Causes** 14 151. A memory leak occurs. 162. The system memory is insufficient. 17 18**Solution** 19 201. Release the memory. 212. Check whether memory leak occurs. 22 23## 9800002 Parcel Operation Failure 24 25**Error Message** 26 27Parcel operation failed. 28 29**Possible Causes** 30 31An exception occurs when invoking the **MessageParcel** object to read or write an object. 32 33**Solution** 34 35Try again later or restart the device. 36 37## 9800003 IPC Failure 38 39**Error Message** 40 41Inner transact failed. 42 43**Possible Causes** 44 45IPC fails. 46 47**Solution** 48 49Try again later or restart the device. 50 51## 9800004 System Service Failure 52 53**Error Message** 54 55System service operation failed. 56 57**Possible Causes** 58 591. The system service is not started. 602. The system service is abnormal. 61 62**Solution** 63 64Try again later or restart the device. 65 66## 9800005 Continuous Task Verification Failure 67 68**Error Message** 69 70Background task verification failed. 71 72**Possible Causes** 73 741. The application repeatedly requests a continuous task. 752. The application repeatedly cancels a continuous task. 763. The value of **bgMode** is invalid because no continuous task type is configured for **backgroundModes** in the application's configuration file. 774. A non-PC device requests the continuous task **KEEPING_TASK**, which is available only for PCs. 78 79**Solution** 80 811. Check the application code. 822. Check whether the application has the system permissions. 833. Check the type of the device where the application is located. 844. Check the value of **backgroundModes**. 85 86## 9800006 Notification Verification Failure 87 88**Error Message** 89 90Notification verification failed. 91 92**Possible Causes** 93 941. The continuous task resources cached in the resource subsystem fail to be loaded. 952. The notification subsystem functions abnormally. 96 97**Solution** 98 991. Check for the continuous task resources **ohos.backgroundtaskmgr.resources**. 1002. Try again later or restart the device. 101 102## 9800007 Continuous Task Storage Failure 103 104**Error Message** 105 106Task storage failed. 107 108**Possible Causes** 109 1101. Failed to create a file to store the task information. 1112. Failed to obtain the file path. 1123. Failed to open the file that stores the task information. 113 114**Solution** 115 1161. Check the **/data/service/el1/public/background_task_mgr/running_task** file. 1172. Try again later or restart the device. 118 119## 9900001 Caller Information Verification Failure for a Transient Task 120 121**Error Message** 122 123Caller information verification failed. 124 125**Possible Causes** 126 1271. Failed to obtain the UID or PID of the caller. 1282. Failed to obtain the bundle name of the caller. 1293. The request ID passed in the API used to cancel the transient task is invalid. 130 131**Solution** 132 1331. Check whether the application UID exists. 1342. Check whether the application has requested a transient task. 1353. Try again later or restart the device. 136 137## 9900002 Continuous Task Verification Failure 138 139**Error Message** 140 141Background task verification failed. 142 143**Possible Causes** 144 1451. The callback passed in **requestSuspendDelay()** already exists. 1462. The callback passed in **cancelSuspendDelay()** does not exist. 1473. The application attempts to request a transient task 5 seconds after it switches to the background. 1484. The application has already requested three transient tasks. 1495. The application's daily quota for transient tasks is used up. 150 151**Solution** 152 1531. Check the application code. 1542. The application should cancel transient tasks immediately after they are complete. 155 156## 18700001 Caller Information Verification Failure for an Energy Resource Request 157 158**Error Message** 159 160Caller information verification failed. 161 162**Possible Causes** 163 1641. Failed to obtain the UID or PID of the caller. 1652. The value of **resourceTypes **for requesting energy resources exceeds the upper limit. 166 167**Solution** 168 169Check the input parameters. 170