How To Fix B1023 - No list defined for class type & and receiver system &

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 023

• Message text: No list defined for class type & and receiver system &

What causes this issue?

The ALE distribution model specifies that, for the logical receiving
system &v2&, data is selected via classification lists. There is no
list maintained for class type &v1& for this receiving system.

How to fix this error?

Maintain lists for this receiving system in the IMG or deactivate the
receiver determination in the receiver lists.

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 B1023 - No list defined for class type & and receiver system & ?

  The SAP error message B1023, which states "No list defined for class type & and receiver system &," typically occurs in the context of SAP Business Workflow or when dealing with Business Object (BO) definitions. This error indicates that there is a missing configuration for a specific class type and receiver system in the workflow or business object setup.
  Cause:
  
  Missing Configuration: The error usually arises when there is no defined list for the specified class type and receiver system in the workflow configuration.
  Incorrect Class Type: The class type specified in the workflow or business object may not be correctly defined or may not exist in the system.
  Receiver System Issues: The receiver system may not be properly configured or may not have the necessary settings to handle the class type.
  
  Solution:
  
  
  Check Configuration:
  
  Go to the transaction code SWDD (Workflow Builder) or SWI1 (Work Item Selection) and check the workflow definitions.
  Ensure that the class type and receiver system are correctly defined in the workflow configuration.
  
  
  
  Define the List:
  
  If the list for the specified class type and receiver system is missing, you will need to create it. This can typically be done in the transaction code SWO1 (Business Object Builder) or SWO2 (Business Object Change).
  Define the necessary attributes and methods for the business object and ensure that the class type is correctly linked to the receiver system.
  
  
  
  Check Class Type:
  
  Verify that the class type specified in the error message exists in the system. You can check this in the transaction code CL02 (Class Maintenance).
  If the class type does not exist, you may need to create it or correct the reference in the workflow.
  
  
  
  Review Receiver System Configuration:
  
  Ensure that the receiver system is properly configured to handle the class type. This may involve checking RFC connections or other integration settings.
  
  
  
  Transport Requests:
  
  If the issue is occurring in a development or quality environment, ensure that all necessary transport requests have been moved to the target environment.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SWDD: Workflow Builder
  SWO1: Business Object Builder
  SWO2: Business Object Change
  CL02: Class Maintenance
  SWI1: Work Item Selection
  
  
  
  Documentation: Refer to SAP Help documentation for detailed information on workflows and business objects.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or Workflow team for further assistance.