How To Fix R3077 - RFC user logon failed. Check connection &1

SAP Error Message - Details

• Message type: E = Error

• Message class: R3 - Service API messages

• Message number: 077

• Message text: RFC user logon failed. Check connection &1

What causes this issue?

You tried to logon to BW using the RFC user. This action failed.

System Response

&V1& &V2&

How to fix this error?

On the following screen, check the destination from the source system
into BW. Make sure you entered the correct password.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message R3077 - RFC user logon failed. Check connection &1 ?

  The SAP error message R3077, "RFC user logon failed. Check connection &1," typically indicates that there is an issue with the Remote Function Call (RFC) connection to the SAP system. This error can occur for various reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  Incorrect Credentials: The username or password used for the RFC connection may be incorrect.
  User Lock: The user account may be locked due to multiple failed login attempts.
  Expired Password: The password for the user may have expired and needs to be reset.
  Network Issues: There may be network connectivity issues between the systems involved in the RFC call.
  Configuration Issues: The RFC destination may not be configured correctly in the SAP system.
  Authorization Issues: The user may not have the necessary authorizations to log in to the target system.
  System Down: The target SAP system may be down or not reachable.
  
  Solutions:
  
  Check Credentials: Verify that the username and password are correct. If necessary, reset the password.
  Unlock User: If the user account is locked, unlock it using transaction code SU01 (User Maintenance).
  Reset Password: If the password has expired, reset it using transaction code SU01.
  Test Connection: Use transaction code SM59 to test the RFC connection. Check the connection settings and ensure they are correct.
  Check Network: Ensure that there are no network issues preventing connectivity between the systems. You can use tools like ping or telnet to check connectivity.
  Review Authorizations: Ensure that the user has the necessary authorizations to access the target system. You can check this using transaction code SU53 (Authorization Check).
  Check System Status: Verify that the target SAP system is up and running. You can check the system status in the SAP GUI or through system monitoring tools.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations (Display and Maintain)
  SU01: User Maintenance
  SU53: Display Authorization Check
  
  
  Logs: Check the system logs (transaction SM21) for any additional error messages that may provide more context.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections.
  
  If the issue persists after trying the above solutions, it may be helpful to consult with your SAP Basis team or SAP support for further assistance.