How To Fix 56766 - Transfer to target system failed, error in communication setup

SAP Error Message - Details

• Message type: E = Error

• Message class: 56 - HR TRAVEL: Messages for Trip Costs Dialog

• Message number: 766

• Message text: Transfer to target system failed, error in communication setup

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 56766 - Transfer to target system failed, error in communication setup ?

  The SAP error message 56766, which states "Transfer to target system failed, error in communication setup," typically indicates an issue with the communication configuration between the source and target systems in an SAP landscape. This error can occur during various operations, such as data transfer, system replication, or remote function calls (RFC).
  Causes:
  
  Incorrect RFC Destination Configuration: The RFC destination may not be set up correctly in the source system, leading to communication failures.
  Network Issues: There may be network connectivity problems between the source and target systems, such as firewalls blocking the connection or incorrect IP addresses.
  Authorization Issues: The user credentials used for the connection may not have the necessary authorizations to perform the operation.
  Target System Unavailability: The target system may be down or not reachable due to maintenance or other issues.
  Incorrect Parameters: The parameters used in the communication setup (like ports, protocols) may be incorrect.
  
  Solutions:
  
  
  Check RFC Destination:
  
  Go to transaction SM59 in the source system.
  Verify the configuration of the RFC destination pointing to the target system.
  Test the connection using the "Connection Test" option to ensure it is working correctly.
  
  
  
  Network Configuration:
  
  Ensure that there are no network issues preventing communication between the systems.
  Check firewall settings to ensure that the necessary ports are open for SAP communication.
  
  
  
  User Authorizations:
  
  Verify that the user credentials used for the RFC connection have the necessary authorizations in both the source and target systems.
  
  
  
  Check Target System Status:
  
  Ensure that the target system is up and running. You can check this by logging into the target system or using transaction SM51 to see if the instance is active.
  
  
  
  Review Communication Parameters:
  
  Double-check the parameters in the RFC destination configuration, including the hostname, service, and any other relevant settings.
  
  
  
  SAP Notes and Documentation:
  
  Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SM51: To check the status of SAP instances.
  ST22: To check for dumps that may provide more context on the error.
  
  
  
  SAP Support: If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance, providing them with detailed logs and error messages.
  
  
  By following these steps, you should be able to identify and resolve the communication setup error indicated by message 56766.