How To Fix WZRE_ALE_MONITOR2017 - Definition of segments differ: &1 (&2 <-> &3 ). No comparison possible.

SAP Error Message - Details

• Message type: E = Error

• Message class: WZRE_ALE_MONITOR2 - IDoc Monitor

• Message number: 017

• Message text: Definition of segments differ: &1 (&2 <-> &3 ). No comparison possible.

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• What is the cause and solution for SAP error message WZRE_ALE_MONITOR2017 - Definition of segments differ: &1 (&2 <-> &3 ). No comparison possible. ?

  Certainly! Here's a detailed explanation of the SAP error message:
  
  SAP Error Message:
  WZRE_ALE_MONITOR2017 Definition of segments differ: &1 (&2 <-> &3 ). No comparison possible.
  
  Meaning / Cause:
  This error occurs during ALE (Application Link Enabling) monitoring or IDoc processing when the system tries to compare the segment definitions of an IDoc type between two systems (e.g., sender and receiver) or between two versions, but finds that the segment definitions differ.
  
  &1 = Segment name
  &2 = Segment definition in one system (or version)
  &3 = Segment definition in the other system (or version)
  
  The system cannot perform a proper comparison because the segment structures are not identical. This usually happens when:
  
  The IDoc segment structure has been changed in one system but not in the other.
  Different versions of the IDoc or segment are active in the sender and receiver systems.
  Custom segments or modifications have been made inconsistently.
  The segment definitions in the Data Dictionary (DDIC) differ between systems.
  
  
  When does it occur?
  
  During ALE monitoring (transaction WE02, WE05, or custom ALE monitoring tools).
  When checking or comparing IDoc segment definitions.
  During IDoc processing or validation steps that involve segment structure comparison.
  
  
  Solution / How to fix:
  
  
  Check IDoc Versions and Segment Definitions:
  
  Use transaction WE30 (IDoc Type Development) to check the segment definitions in both systems.
  Compare the segment definitions for the segment mentioned in the error (&1).
  Ensure that the segment structure (fields, data elements, lengths) is identical in both systems.
  
  
  
  Synchronize IDoc Types:
  
  If the segment definitions differ, transport the correct IDoc type and segment definitions from the development system to the other system(s).
  Make sure that the same version of the IDoc type is active in both sender and receiver systems.
  
  
  
  Check for Custom Segments or Enhancements:
  
  If custom segments have been added, verify that they exist and are identical in both systems.
  Transport any missing or changed segments.
  
  
  
  Use Transaction WE19 (Test Tool) or WE31 (Segment Editor):
  
  Test the IDoc with the segment in question.
  Edit or recreate the segment if necessary.
  
  
  
  Check ALE Distribution Model:
  
  Verify that the distribution model (transaction BD64) is consistent and that the correct IDoc types and versions are distributed.
  
  
  
  Re-import or Re-activate IDoc Types:
  
  Sometimes re-importing or re-activating the IDoc types and segments can resolve inconsistencies.
  
  
  
  
  Additional Information:
  
  IDoc Segment: A segment is a structural unit of an IDoc, containing fields that represent data.
  ALE Monitoring: ALE monitors the exchange of IDocs between systems and checks for consistency.
  Transport Requests: Changes to IDoc types and segments should be transported properly to avoid inconsistencies.
  Tools:
  
  WE30: IDoc Type development and display.
  WE31: Segment editor.
  WE02 / WE05: IDoc display and monitoring.
  BD64: Distribution model maintenance.
  WE19: IDoc test tool.
  
  
  
  
  Summary:
  The error indicates a mismatch in the segment definitions of an IDoc segment between two systems or versions, preventing comparison. The fix involves ensuring that the segment definitions are identical by checking, synchronizing, and transporting the IDoc types and segments properly.
  
  If you need help with specific steps or transactions, feel free to ask!