How To Fix WS660 - Target partner schema &1 has fewer partner roles than source schema &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 660

• Message text: Target partner schema &1 has fewer partner roles than source schema &2

What causes this issue?

In the target partner schema &V1&, partner roles intended for the source
schema &V2& are missing. This means that not all partners can be copied
and cancellation documents deviate from the source documents.

System Response

The document &V3& cannot be cancelled.

How to fix this error?

Adjust partner schemas &V1& and &V2& so they match. Ensure that partner
schema &V1& contains all partner roles of partner schema &V2&.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WS660 - Target partner schema &1 has fewer partner roles than source schema &2 ?

  The SAP error message:
  WS660 Target partner schema &1 has fewer partner roles than source schema &2
  
  Meaning / Cause
  This error occurs during the configuration or processing of IDoc partner profiles in SAP ALE/EDI. It indicates that the target partner schema (the schema assigned to the receiving partner) has fewer partner roles defined than the source partner schema (the schema assigned to the sending partner).
  In other words, the partner schema on the receiving side does not include all the partner roles that exist in the sending side's partner schema. Since partner roles define the roles a partner can play in message exchange (e.g., LS - Logical System, KU - Customer, LI - Vendor, etc.), having fewer roles in the target schema means the system cannot properly map or process all the roles expected from the source schema.
  
  When does it occur?
  
  During IDoc processing or partner profile configuration.
  When assigning or comparing partner schemas in transaction WE20 or during ALE distribution model setup.
  When the system tries to validate or map partner roles between source and target schemas.
  
  
  Solution
  
  
  Check Partner Schemas:
  
  Go to transaction WE20 (Partner Profiles).
  Identify the source and target partner schemas involved.
  Review the partner roles assigned to each schema.
  
  
  
  Add Missing Partner Roles:
  
  Ensure that the target partner schema has all the partner roles that exist in the source partner schema.
  Add the missing partner roles to the target schema to match or exceed the roles in the source schema.
  
  
  
  Adjust Distribution Model:
  
  In transaction BD64 (Distribution Model), check the model view.
  Make sure the partner schemas assigned to the sender and receiver are consistent and correctly maintained.
  
  
  
  Re-generate or Re-assign Partner Schemas:
  
  If partner schemas were generated automatically, consider regenerating them to include all necessary roles.
  Alternatively, manually adjust the schemas to ensure completeness.
  
  
  
  Test the Configuration:
  
  After adjustments, test the IDoc processing or ALE distribution to confirm the error is resolved.
  
  
  
  
  Additional Information
  
  
  Partner Roles define the function of a partner in the communication process. Common roles include:
  
  LS: Logical System
  KU: Customer
  LI: Vendor
  AG: Agent
  WE: Warehouse
  
  
  
  Partner schemas are used to group partner roles and simplify partner profile management.
  
  
  This error is a validation check to ensure consistent partner role definitions between sender and receiver, which is critical for correct message processing.
  
  
  If you are unsure which roles are missing, compare the partner roles in both schemas side-by-side.
  
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Target partner schema has fewer partner roles than source partner schema.
  
  
  Effect
  System cannot properly map or process all partner roles during IDoc/ALE processing.
  
  
  Solution
  Add missing partner roles to the target partner schema to match or exceed the source schema.
  
  
  Transactions
  WE20 (Partner Profiles), BD64 (Distribution Model)
  
  
  
  
  If you need further help, you can also check SAP Notes related to ALE partner schema errors or consult SAP documentation on partner profiles and ALE configuration.