How To Fix ICL_MAIN_OUT002 - Communication error in RFC call of &1; destination: &2, error: &3

SAP Error Message - Details

• Message type: E = Error

• Message class: ICL_MAIN_OUT - Jointly Used Messages of Outbound Interface

• Message number: 002

• Message text: Communication error in RFC call of &1; destination: &2, error: &3

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ICL_MAIN_OUT002 - Communication error in RFC call of &1; destination: &2, error: &3 ?

  The SAP error message ICL_MAIN_OUT002 indicates a communication error during an RFC (Remote Function Call) operation. This error typically occurs when there is a problem with the connection to the specified destination in the SAP system. Here’s a breakdown of the components of the error message:
  
  &1: The name of the function module or program that is trying to make the RFC call.
  &2: The destination (RFC destination) that the system is trying to connect to.
  &3: The specific error message or code that provides more details about the communication issue.
  
  Causes
  
  Network Issues: There may be network connectivity problems between the SAP systems involved in the RFC call.
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system (transaction SM59).
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations.
  System Availability: The target system may be down or not reachable.
  Firewall or Security Settings: Firewalls or security settings may be blocking the communication between the systems.
  SAP Gateway Issues: Problems with the SAP Gateway service can also lead to communication errors.
  
  Solutions
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems. You can use tools like ping or traceroute to test connectivity.
  Verify RFC Destination:
  
  Go to transaction SM59 and check the configuration of the RFC destination specified in the error message.
  Test the connection using the "Connection Test" option in SM59.
  
  
  Check User Authorizations: Ensure that the user credentials used for the RFC call have the necessary authorizations to perform the operation.
  Check System Status: Verify that the target system is up and running. You can check the system status in transaction SM51 or SM66.
  Review Firewall Settings: If applicable, check the firewall settings to ensure that the required ports for RFC communication are open.
  Check SAP Gateway: Ensure that the SAP Gateway service is running properly. You can check the status of the gateway using transaction SMGW.
  Review Logs: Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages that may provide more context.
  
  Related Information
  
  Transaction Codes:
  
  SM59: RFC Destination Configuration
  SM21: System Log
  ST22: Dump Analysis
  SMGW: Gateway Monitor
  ST11: Developer Traces
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC communication errors.
  Documentation: Review SAP documentation for more details on RFC communication and troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the communication error indicated by the ICL_MAIN_OUT002 message.