1# Upload and Download 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## 13400001 File Operation Error 8 9**Error Message** 10 11Invalid file or file system error. 12 13**Description** 14 15This error code is reported when the **uploadFile** or **downloadFile** API fails to be invoked to upload or download a file. 16 17**Possible Causes** 18 19The file permission is insufficient. 20 21**Solution** 22 23Make sure you have the required permission on the target files. 24 25## 13400002 File Path Error 26 27**Error Message** 28 29File path not supported or invalid. 30 31**Description** 32 33This error code is reported when a file path error occurs in invoking the **uploadFile** or **downloadFile** API. 34 35**Possible Causes** 36 37The file path is incorrect or the file already exists in the path. 38 39**Solution** 40 41Verify the file path. 42 43## 13400003 Service Error 44 45**Error Message** 46 47Task service ability error. 48 49**Description** 50 51This error code is reported when a task manager service error occurs in invoking the **downloadFile** API. 52 53**Possible Causes** 54 55The task fails to be created. 56 57**Solution** 58 59Verify the task settings. 60 61## 13499999 Other Error 62 63**Error Message** 64 65Other error. 66 67**Description** 68 69This error code is reported when other error occurs in invoking the **uploadFile** or **downloadFile** API. 70 71**Possible Causes** 72 73The task fails to be created. 74 75**Solution** 76 77Verify the task settings. 78 79 80## 21900004 Application Task Queue Full 81 82**Error Message** 83 84The application task queue is full. 85 86**Description** 87 88This error code is reported when the application task queue is full. 89 90**Possible Causes** 91 92The application fails to create a background task (resources are preempted by foreground tasks, where no task queue is involved). 93 94**Solution** 95 961. Obtain all background tasks of the application through the query API. 97 982. Proactively remove tasks not needed to release the quota. 99 1003. Create a background task again. 101 102## 21900005 Task Mode Error 103 104**Error Message** 105 106Operation with wrong task mode. 107 108**Description** 109 110This error code is reported when a task mode error occurs. 111 112**Possible Causes** 113 114The application attempts to create a foreground task when it is not running in the foreground. 115 116**Solution** 117 1181. Register and deregister an event listener for a foreground application. 119 1202. Follow the instructions in the API reference document. 121 122## 21900006 Task Not Found 123 124**Error Message** 125 126Task removed or not found. 127 128**Description** 129 130This error code is reported when the task does not exist. 131 132**Possible Causes** 133 134The task to remove or query does not exist. 135 136**Solution** 137 1381. Query existing tasks through the query API. 139 1402. Check whether the target task exists. (The system periodically deletes junk tasks.) 141 1423. Verify the task ID and try again. 143 144## 21900007 Operation Not Supported by the Task State 145 146**Error Message** 147 148Operation with wrong task state. 149 150**Description** 151 152This error code is reported when an operation is not supported by the task state. 153 154**Possible Causes** 155 1561. The task to start has been deleted. 157 1582. The task to start has not been initialized. 159 1603. The task to pause is not being executed. 161 1624. The task to resume is not paused. 163 1645. The task to stop is not being executed. 165 166**Solution** 167 1681. Query the task state. 169 1702. Perform the operation supported by the current task state. 171 172## 21900008 Task Group Not Found or Deleted 173 174**Error Message** 175 176Group deleted or not found. 177 178**Description** 179 180This error code is reported when a task group does not exist or has been deleted. 181 182**Possible Causes** 183 1841. Delete a task group that has been deleted or does not exist. 185 1862. Add a task to a group that has been deleted or does not exist. 187 188**Solution** 189 190Check whether the target group has been deleted. 191