How To Fix B1202 - Sending system must be different to receiving system

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 202

• Message text: Sending system must be different to receiving 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 B1202 - Sending system must be different to receiving system ?

  The SAP error message B1202, which states "Sending system must be different to receiving system," typically occurs in scenarios involving data transfer or communication between different SAP systems, such as during the execution of IDocs, RFC calls, or other integration processes. This error indicates that the system is trying to send data to itself, which is not allowed in the context of the operation being performed.
  Cause:
  
  Configuration Issue: The sending and receiving systems are incorrectly configured to point to the same system.
  Logical System Settings: The logical system names in the configuration might be set to the same value for both sending and receiving systems.
  IDoc Processing: When processing IDocs, if the sender and receiver are set to the same logical system, this error will occur.
  RFC Destination: If an RFC destination is incorrectly set to point to the same system for both sending and receiving, this error can arise.
  
  Solution:
  
  
  Check Logical System Configuration:
  
  Go to transaction SALE (SAP Customizing Implementation Guide).
  Navigate to Basic Settings -> Logical System -> Define Logical System.
  Ensure that the logical system names for the sending and receiving systems are different.
  
  
  
  Review RFC Destinations:
  
  Use transaction SM59 to check the RFC destinations.
  Ensure that the destination for the receiving system is correctly configured and does not point back to the sending system.
  
  
  
  IDoc Settings:
  
  If you are working with IDocs, check the partner profiles in transaction WE20.
  Ensure that the partner profiles for the sender and receiver are correctly set up and that they refer to different logical systems.
  
  
  
  Check Configuration in Middleware:
  
  If you are using middleware (like SAP PI/PO), ensure that the configuration does not inadvertently route messages back to the same system.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test to ensure that the data transfer works as expected without triggering the error.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SALE: For logical system configuration.
  SM59: For managing RFC destinations.
  WE20: For managing partner profiles for IDocs.
  
  
  
  Documentation: Refer to SAP Help documentation for more details on configuring logical systems and RFC destinations.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  
  By following these steps, you should be able to resolve the B1202 error and ensure proper communication between your SAP systems.