How To Fix DMC_RT_MSG202 - Communication error occurred by calling function module in sender system

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_RT_MSG - DMC: Runtime Object Messages

• Message number: 202

• Message text: Communication error occurred by calling function module in sender system

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_RT_MSG202 - Communication error occurred by calling function module in sender system ?

  The SAP error message DMC_RT_MSG202 indicates that a communication error occurred when calling a function module in the sender system. This error is typically related to issues in the Data Migration Cockpit (DMC) or during data transfer processes between systems.
  Causes:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  Authorization Issues: The user may not have the necessary authorizations to execute the function module in the sender system.
  Function Module Errors: The function module being called may not exist, may be inactive, or may have been modified incorrectly.
  Configuration Issues: Incorrect configuration settings in the DMC or in the RFC (Remote Function Call) destination.
  System Performance: High load on the sender system may lead to timeouts or communication failures.
  Version Compatibility: Incompatibility between different SAP versions or components.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems. You can use tools like ping or traceroute to diagnose network issues.
  Verify Authorizations: Check the user authorizations in both the sender and receiver systems to ensure that the user has the necessary permissions to execute the function module.
  Inspect Function Module: Verify that the function module exists in the sender system, is active, and has not been modified in a way that would prevent it from executing correctly.
  Review RFC Configuration: Check the RFC destination settings in transaction SM59 to ensure that they are correctly configured and that the connection is working.
  Monitor System Performance: Use transaction ST22 to check for dumps or SM21 for system logs to identify any performance issues or errors that may be affecting the sender system.
  Check for Updates: Ensure that both systems are updated to the latest patches and versions, as there may be bug fixes or improvements that address the issue.
  Consult SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that may address this specific error message or related issues.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  ST22 - Dump Analysis
  SM21 - System Log
  SICF - HTTP Services
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with detailed logs and error messages for better diagnosis.
  
  By following these steps, you should be able to identify and resolve the communication error associated with the DMC_RT_MSG202 message.