How To Fix RSDD_ZA388 - RFC connection error occurred. See details for instructions

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 388

• Message text: RFC connection error occurred. See details for instructions

What causes this issue?

An RFC connection error has occurred.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can find information about actions required and suggestions in the
details of the check.
Contact your system administrator or SAP support.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD_ZA388 - RFC connection error occurred. See details for instructions ?

  The SAP error message RSDD_ZA388 indicates that there is an RFC (Remote Function Call) connection error. This error typically occurs when there is an issue with the communication between the SAP system and another system or service, such as a database or another SAP instance. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Incorrect RFC Destination: The RFC destination may be incorrectly configured or may not exist.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  Service Unavailability: The target service or system may be down or not reachable.
  Configuration Errors: There may be misconfigurations in the SAP system or the target system.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the target system is reachable from the SAP server.
  Ensure that there are no firewall rules blocking the connection.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination that is causing the error.
  Test the connection using the "Test Connection" button to see if it is working properly.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  You can check user roles and authorizations in transaction SU01.
  
  
  
  Check Service Availability:
  
  Ensure that the target system or service is up and running.
  If it is a database connection, check if the database service is active.
  
  
  
  Review Configuration Settings:
  
  Review the configuration settings in both the SAP system and the target system for any discrepancies.
  Ensure that the connection parameters (like host, port, etc.) are correctly set.
  
  
  
  Check SAP Notes:
  
  Look for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SU01: To manage user accounts and authorizations.
  ST22: To check for dumps that might provide more context on the error.
  SM21: To view system logs for any related error messages.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more detailed troubleshooting steps and best practices regarding RFC connections.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.