Confidential email - Failed to connect smart card or key file

Q: A user found that she cannot open CM in her Lotus Notes, the following message was displayed.

What should we do to prevent the user to met the token error when accessing confidential email?


Ans:
If the key file is exist then
    If e-token can locate the key file then
        restart Lotus Notes to try again
    else try to unplug the token and plug it before excute the LN
else try to replace the token.