How To Fix COOPC102 - RFC communication error; &1&2&3&4

SAP Error Message - Details

• Message type: E = Error

• Message class: COOPC - Messages for SAP-OPC Integration

• Message number: 102

• Message text: RFC communication error; &1&2&3&4

What causes this issue?

When accessing an <DS:GLOS.81831343B0CAD411B11B0008C784EFB1>OPC server
</>, an <DS:GLOS.3526AFF8AFAB52B9E10000009B38F974>RFC</> communication
error occurred. The <DS:GLOS.9E1CCF44B0CAD411B11B0008C784EFB1>SAP ODA
Connector</> was not reached.
The text of the RFC error reads as follows: "&V1&&V2&&V3&&V4&".

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?

Check the RFC destination definition.
To do so, go to Customizing for <LS>Production Planning - Process
Industries</> and choose <LS>Process Management</> -> <LS>SAP ODA (OPC
Data Access)</> -> <DS:SIMG.COOPC110>Define RFC Destination for SAP ODA
</>.
Test the RFC connection.

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 COOPC102 - RFC communication error; &1&2&3&4 ?

  The SAP error message COOPC102, which indicates an "RFC communication error," typically arises when there is a problem with the Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. The error message may include additional details represented by placeholders (&1, &2, &3, &4) that provide specific information about the nature of the error.
  Causes of COOPC102 RFC Communication Error
  
  
  Network Issues: Problems with the network connection between the systems can lead to communication failures. This could be due to firewalls, routing issues, or network outages.
  
  
  Configuration Errors: Incorrect configuration of RFC destinations in the SAP system can cause communication errors. This includes incorrect settings in transaction SM59.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  
  
  System Availability: The target system may be down or not reachable, leading to communication errors.
  
  
  Version Compatibility: Incompatibility between different versions of SAP systems can also lead to RFC communication issues.
  
  
  Timeouts: If the RFC call takes too long to respond, it may time out, resulting in an error.
  
  
  Solutions to COOPC102 RFC Communication Error
  
  
  Check Network Connectivity: Ensure that there is a stable network connection between the systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 and check the configuration of the RFC destination.
  Ensure that the connection type, target host, and system number are correctly configured.
  Test the connection using the "Test Connection" button in SM59.
  
  
  
  Review User Authorizations: Ensure that the user credentials used for the RFC connection have the necessary authorizations. You can check this in transaction SU01.
  
  
  Check System Status: Verify that the target system is up and running. You can check the system status in transaction SM51 or by logging into the target system.
  
  
  Review Logs: Check the system logs for any additional error messages that may provide more context. You can use transaction SM21 to view the system log.
  
  
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  
  
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to the COOPC102 error.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SU01: User Maintenance
  SM21: System Log
  SM51: List of Active Instances
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more detailed information on RFC communication and troubleshooting.
  
  
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to diagnose and resolve the COOPC102 RFC communication error effectively.