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

B1023 - Overview

• 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