How To Fix W0102 - Due to RFC problem '&1' at '&2', certain checks are not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 102

• Message text: Due to RFC problem '&1' at '&2', certain checks are not possible

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message W0102 - Due to RFC problem '&1' at '&2', certain checks are not possible ?

  Certainly! Here's detailed information about the SAP error message W0102:
  
  SAP Message W0102
  Message Text:
  
  Due to RFC problem '&1' at '&2', certain checks are not possible.
  
  Meaning / Cause
  This warning message indicates that during an operation, SAP tried to perform certain remote function calls (RFC) to another system or client, but encountered an RFC communication problem. Because of this RFC issue, some checks or validations that depend on the remote system could not be performed.
  
  &1: The specific RFC error or problem description.
  &2: The target system or destination where the RFC was attempted.
  
  Common causes include:
  
  Network connectivity issues between the SAP systems.
  The remote system is down or not reachable.
  Incorrect or missing RFC destination configuration.
  Authorization problems for the RFC user.
  The remote system's gateway or dispatcher is not running.
  Timeouts or communication errors.
  
  
  Effects
  
  Certain validations or checks that require data or confirmation from the remote system are skipped or not performed.
  This may lead to incomplete or inconsistent data checks.
  Usually, this is a warning (not an error), so the process continues but with limited validation.
  
  
  Solution / Troubleshooting Steps
  
  
  Check RFC Destination:
  
  Use transaction SM59 to test the RFC destination mentioned in the message.
  Verify that the connection test is successful.
  If the test fails, check the configuration parameters (target host, system number, user credentials).
  
  
  
  Check Network Connectivity:
  
  Ensure that the network connection between the source and target SAP systems is stable.
  Ping the target host from the source server.
  Check firewall settings that might block communication.
  
  
  
  Check Remote System Status:
  
  Verify that the remote SAP system is up and running.
  Check that the gateway and dispatcher are active.
  
  
  
  Check User Authorizations:
  
  Ensure the RFC user has the necessary authorizations to execute the required remote functions.
  
  
  
  Review System Logs:
  
  Check system logs (SM21) and developer traces (ST11) for related errors.
  Look for gateway errors or communication failures.
  
  
  
  Retry the Operation:
  
  After fixing the RFC issue, retry the operation to see if the warning disappears.
  
  
  
  Consult Basis Team:
  
  If the problem persists, involve the SAP Basis team to analyze network and system-level issues.
  
  
  
  
  Additional Information
  
  This message is a warning (W), not an error, so it does not stop the process but indicates potential incomplete checks.
  The exact RFC problem text (&1) can give clues about the root cause (e.g., "connection refused", "logon denied", "timeout").
  This message can appear in various contexts where cross-system checks are performed, such as data replication, validations, or integrations.
  
  
  If you provide the exact values of &1 and &2 from your system, I can help analyze the specific RFC problem further.