How To Fix B1657 - Partner systems must not match in BD64 &1 &2 &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 657

• Message text: Partner systems must not match in BD64 &1 &2 &3 &4

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message B1657 - Partner systems must not match in BD64 &1 &2 &3 &4 ?

  The SAP error message B1657 indicates that there is a mismatch in the partner systems defined in the distribution model (BD64) for the logical systems involved in the message. This error typically arises when you are trying to set up or modify a distribution model in SAP's ALE (Application Link Enabling) environment, and it suggests that the partner systems you are trying to configure are identical or not set up correctly.
  Cause:
  The error occurs when:
  
  You have defined the same logical system as both the sender and receiver in the distribution model.
  There is an attempt to create a model view where the same system is listed as both a sender and a receiver, which is not allowed.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Distribution Model (BD64):
  
  Go to transaction code BD64.
  Review the distribution model you are working with.
  Ensure that the sender and receiver logical systems are different. If they are the same, you need to modify the model to use different logical systems.
  
  
  
  Modify the Partner Profiles:
  
  If you have mistakenly set the same logical system as both sender and receiver, you will need to create or modify the partner profiles accordingly.
  Ensure that each logical system is uniquely defined and that they do not overlap in the roles they are assigned.
  
  
  
  Create New Logical Systems:
  
  If necessary, create new logical systems to represent different entities in your distribution model.
  Use transaction code SALE to manage logical systems and their configurations.
  
  
  
  Check for Existing Configurations:
  
  Ensure that there are no existing configurations that might be causing conflicts. Sometimes, previous settings can lead to confusion in the current setup.
  
  
  
  Test the Configuration:
  
  After making the necessary changes, test the configuration to ensure that the error does not reoccur.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  BD64: Distribution Model Maintenance
  SALE: Logical System Configuration
  
  
  Documentation: Refer to SAP Help documentation for ALE and distribution model configuration for more detailed guidance.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  By ensuring that the partner systems are correctly defined and do not match, you should be able to resolve the B1657 error and successfully configure your distribution model.