Method used to handle the license activation failure on firewalls

The solution to the license activation failure is as follows:
Probable causes:
-The entered license file does not exist.
-The license file does not match the system software.
-The license file is incorrect.
You can handle the problem as follows:
1. The system displays "Error: Failed to open the file."
Check whether the entered license file exists, whether the entered file name is correct, or whether the license file is in the root directory of the storage device.
2. The system displays "Error:File is overlength."
This message indicates that the license file is overlength. Check whether the file is correct. Generally, the license file is a dat file.
3. The system displays "Error:License file format error."
The license file does not match the product information. You need to apply for the license again.
4. The system displays "Failure:Failed to activate the license file."
Generally, if the preceding messages are not displayed simultaneously, the license file is damaged or the file is not a license file. You need to transmit the file to the device in binary mode again.

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