1# ohos.screenLockFileManager 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## 29300001 Invalid Parameter
8
9**Error Message**
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11Invalid DataType.
12
13**Possible Causes**
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15An error occurs during parameter verification. Specifically, **dataType** is not **MEDIA_DATA** or **ALL_DATA**.
16
17**Solution**
18
19Correct invalid parameter values.
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21
22## 29300002 System Service Abnormal
23
24**Error Message**
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26The system ability work abnormally.
27
28**Possible Causes**
29
30System services are not working properly. The possible causes are as follows:
311. Sensitive data access management on the lock screen is not started properly.
322. The read or write of IPC data fails.
33
34**Solution**
35
36System services do not work properly. Try again later or restart the device.
37
38
39## 29300003 Sensitive Data Access Management Under Lock Screen Is Not Enabled
40
41**Error Message**
42
43The application is not enabled the data protection under lock screen.
44
45**Possible Causes**
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471. The **ohos.permission.PROTECT_SCREEN_LOCK_DATA** permission is not configured in through [requestpermissions](../../security/AccessToken/declare-permissions.md#declaring-permissions-in-the-configuration-file) to enable sensitive data access management on the lock screen.
482. The device does not support sensitive data access management on the lock screen.
49
50**Solution**
51
52Configure the **ohos.permission.PROTECT_SCREEN_LOCK_DATA** permission through [requestpermissions](../../security/AccessToken/declare-permissions.md#declaring-permissions-in-the-configuration-file) to enable sensitive data access management on the lock screen.
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54
55## 29300004 Permission to Access Sensitive Data on the Lock Screen Has Been Revoked
56
57**Error Message**
58
59File access is denied.
60
61**Possible Causes**
62
63The permission to access sensitive data on the lock screen has been revoked.
64
65**Solution**
66
67Sensitive data cannot be accessed on the lock screen. If necessary, ask the user to unlock the screen again. The sensitive data can be used only after the screen is unlocked.
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69
70## 29300005 Permission to Access Sensitive Data on the Lock Screen Is Not Requested
71
72**Error Message**
73
74File access was not acquired.
75
76**Possible Causes**
77
78The permission to access sensitive data on the lock screen is not requested.
79
80**Solution**
81
82Ensure that the permission to access sensitive data on the lock screen is requested before calling the API to revoke the permission.
83