This error code is reported if an error occurs during JS parameter parsing. The possible causes are as follows:
1. The number of input parameters is insufficient.
2. The parameter type is incorrect.
Parameter invalid, message is ${messageInfo}.
### Solution
1. Add input parameters.
2. Correct parameter types.
**Possible Causes**
This error code is reported if an error occurs during parameter verification. The possible causes are as follows:
- The value of **tokenId** is **0**.
- The permission name is empty or exceeds 256 characters.
- The **flag** value in the permission authorization or revocation request is invalid.
- The input parameters specified for registering a listener are incorrect.
## 201 Permission denied.
**Solution**
### Error Message
Permission denied.${messageInfo}.
Correct the invalid parameter values.
### Possible Causes
This error code is reported if the application process that calls an API is not granted the required permission. The possible causes are as follows:
1. The application process is not granted the required permission.
2. The permission requires user authorization to take effect, but the application process does not obtain the user authorization.
### Solution
1. Check whether the application process is granted the required permission.
2. Check whether the application process has obtained the user authorization if the permission requires user authorization to take effect.
## 12100002 TokenId Does Not Exist
**Error Message**
## 12100001 Invalid Parameters
TokenId does not exist.
### Error Message
Parameter invalid, message is ${messageInfo}.
**Possible Causes**
### Possible Causes
This error code is reported if an error occurs during parameter verification. The possible causes are as follows:
1. The value of **tokenId** is **0**.
2. The specified permission name is empty or contains more than 256 characters.
3. The **flag** value in the permission authorization or revocation request is invalid.
4. The input parameters specified for registering a listener are incorrect.
- The specified **tokenId** does not exist.
- The process of the specified **tokenId** is not an application process.
### Solution
1. Correct the invalid parameter values.
**Solution**
Set **tokenId** correctly.
## 12100002 TokenId does not exist.
### Error Message
TokenId does not exist.
### Possible Causes
1. The specified **tokenId** does not exist.
2. The process corresponding to the specified **tokenId** is not an application process.
## 12100003 Permission Does Not Exist
### Solution
Set a correct **tokenId**, and make sure that the process corresponding to the specified **tokenId** is an application process.
**Error Message**
Permission does not exist.
## 12100003 Permission Not Exist
**Possible Causes**
### Error Message
Permission does not exist.
- The specified **permissionName** does not exist.
- The specified **permissionName** does not match the **tokenId** in the permission authorization or revocation scenario.
- The specified **permissionName** is not a sensitive permission that requires user authorization.
### Possible Causes
1. The specified **permissionName** does not exist.
2. The specified **permissionName** does not match the specified **tokenId** in the permission authorization or revocation scenario.
3. The specified **permissionName** is not a sensitive permission that requires user authorization.
**Solution**
### Solution
Set the **permissionName** parameter correctly. For details, see [permission-list](../../security/permission-list.md).
## 12100004 Listener APIs Not Used in Pairs
### Error Message
The listener interface is not used together.
**Error Message**
The interface is not used together.
**Possible Causes**
### Possible Causes
This error code is reported if listener APIs are not used in pairs. The possible causes are as follows:
1. The listener APIs that need to be used in pairs are repeatedly called.
2. The listener APIs that need to be used in pairs are independently called.
### Solution
**Solution**
1. Check whether the API needs to be used in pairs. That is, if an API is called to enable listening, an API with the same input parameters cannot be called unless an API is called to stop listening first.
2. Check whether the API needs to be used in pairs. That is, an API for disabling listening or unregistering a listener can only be called after the API for enabling listening or registering a listener is called.
## 12100005 Listener Overflow
### Error Message
**Error Message**
The number of listeners exceeds the limit.
### Possible Causes
**Possible Causes**
The number of listeners exceeds 200 (the upper limit).
### Solution
Abandon unused listeners in a timely manner.
**Solution**
Release unused listeners in a timely manner.
## 12100006 Permission Granting or Revocation Not Supported for the Specified Application
### Error Message
**Error Message**
The specified application does not support the permissions granted or ungranted as specified.
### Possible Causes
1. The specified **tokenId** is the identity of the remote device. Distributed granting and revocation are not yet supported.
**Possible Causes**
1. The specified **tokenId** is the identity of the remote device. Distributed permission granting and revocation are not yet supported.
2. The specified **tokenId** belongs to a sandbox application, which is not allowed to apply for the specified permission.
### Solution
**Solution**
1. Check whether the method of obtaining **tokenId** is correct.
2. Check whether the sandbox application works in restrictive mode. Most permissions cannot be granted to a sandbox application in restrictive mode.
## 12100007 System Services Not Working Properly
### Error Message
**Error Message**
Service is abnormal.
### Possible Causes
**Possible Causes**
This error code is reported if system services are not working properly. The possible causes are as follows:
1. The permission management service cannot be started properly.
2. An error occurs while reading or writing IPC data.
- The permission management service cannot start properly.
- The read or write of IPC data fails.
**Solution**
### Solution
System services do not work properly. Try again later or restart the device.
