Message type: E = Error
Message class:  CNVMBTRFC - Messages used in RFC Management and its objects 
Message number: 020
Message text: Selected RFC Destination will be applied. Please enter a password.
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The SAP error message CNVMBTRFC020 indicates that a selected RFC (Remote Function Call) destination requires a password to establish a connection. This typically occurs in scenarios where the system is trying to connect to another SAP system or an external system using an RFC destination, and the credentials for that destination have not been provided or are incorrect.
Cause: Missing Password: The RFC destination is configured to require a password, but it has not been provided in the connection settings. Incorrect Credentials: The password provided for the RFC destination is incorrect or has changed.
Configuration Issues: The RFC destination may not be properly configured in the SAP system.
Solution: Check RFC Destination Configuration: Go to transaction SM59 in the SAP GUI. Locate the RFC destination that is causing the issue. Check the settings, especially the "Logon & Security" tab, to ensure that the username and password are correctly entered. Enter Password: If the password is missing, enter the correct password for
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