How To Fix B1870 - Note: The ALE interface must be regenerated afterwards

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 870

• Message text: Note: The ALE interface must be regenerated afterwards

What causes this issue?

An ALE interface has already been generated for the BAPI (&v1&, &v2&).
The function module &v3& must be regenerated, if the hierarchical
dependencies between the table parameters have changed.

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 B1870 - Note: The ALE interface must be regenerated afterwards ?

  The SAP error message B1870 typically indicates that there is an issue with the Application Link Enabling (ALE) interface in your SAP system. This error often arises when there are changes made to the data structures or the configuration of the ALE interface, which necessitates a regeneration of the interface to ensure that it functions correctly.
  Cause:
  
  Changes in Data Structures: If there have been changes to the underlying data structures (like adding or modifying fields in a table), the ALE interface may become outdated.
  Configuration Changes: Changes in the configuration of the ALE settings, such as message types or distribution model, can also lead to this error.
  Inconsistencies: If there are inconsistencies in the ALE configuration or if the necessary objects are not activated, this error can occur.
  
  Solution:
  To resolve the B1870 error, you need to regenerate the ALE interface. Here are the steps to do this:
  
  Access the Transaction Code: Use transaction code WE30 to access the IDoc type definition.
  Regenerate the IDoc: 
  
  Select the IDoc type that is causing the issue.
  Click on the "Generate" button to regenerate the IDoc.
  
  
  Regenerate the ALE Interface:
  
  Use transaction code WE20 to access the partner profiles.
  Ensure that the partner profiles are correctly configured.
  Regenerate the necessary distribution model using transaction code BD64.
  
  
  Check for Errors: After regeneration, check for any errors in the ALE configuration using transaction code WE02 to monitor IDocs and ensure that they are processed correctly.
  Test the Interface: Perform a test to ensure that the ALE interface is functioning as expected after regeneration.
  
  Related Information:
  
  Documentation: Refer to SAP Help documentation for detailed information on ALE and IDoc processing.
  Transaction Codes:
  
  WE30: IDoc Type Maintenance
  WE20: Partner Profile
  BD64: Distribution Model
  WE02: IDoc Display
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to the B1870 error.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or technical team for further investigation, as there may be deeper configuration issues or system inconsistencies that need to be addressed.