How To Fix MCEX145 - Extraction structure &1 was changed -> See long text

SAP Error Message - Details

• Message type: E = Error

• Message class: MCEX - Extraction Interface LIS/BW

• Message number: 145

• Message text: Extraction structure &1 was changed -> See long text

What causes this issue?

Note the following points before transporting the changed structure
&V1& into another system:
The transport should be carried out at a time when no postings are
being made in the target system. Otheriwse initialization is necessary,
otherwise documents that are created during this phase will get lost.
In the target system there should be no data in any clients for the V3
update for application &V2&. If you are not sure, start the V3 update
directly for application &V2& in all clients.
If there is still data in central delta management for the target
system you should get this before the transport from BW takes place.
If you have already carried out a restructure in the target system, it
may be that the data is still available in the restructure tables.
After the transport, these entries are no longer copied into BW. The
contents of the restructure tables for the application &V2& should be
deleted in the target system and a restructure may need to be carried
out.
If the update log is active in the target system, the log data from
application &V2& can no longer be read after the transport. This is
only possible after posting and the relevant overwriting of the last
log entry.
You can use report RMCSBWCC to display a log in the target system for
the changed extract structure saying whether one of the above problems
has occurred. An additional switch allows you to delete all update logs
for the application of all selected extractors.
Note that if you change the extract structure, you need to reactivate
the transfer structures in BW.

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message MCEX145 - Extraction structure &1 was changed -> See long text ?

  The SAP error message MCEX145 indicates that an extraction structure has been changed, which can affect data extraction processes, particularly in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence). This message typically arises when there are modifications to the data model, such as changes in the InfoObject, InfoProvider, or the extraction structure itself.
  Cause:
  
  Changes in the Extraction Structure: The extraction structure has been modified, which may include adding or removing fields, changing data types, or altering the structure in a way that impacts data extraction.
  Inconsistencies: There may be inconsistencies between the data source and the extraction structure, leading to issues during data extraction.
  Versioning Issues: If the extraction structure has been updated in a newer version of the system, it may not be compatible with the existing data flows or processes.
  
  Solution:
  
  Review the Long Text: The error message suggests checking the long text for more details. This can provide specific information about what has changed in the extraction structure.
  Update Data Flow: If the extraction structure has changed, you may need to update the data flow or transformation rules in your BW/BI system to accommodate these changes.
  Re-activate the DataSource: If the extraction structure has been modified, you may need to re-activate the DataSource in the SAP BW system. This can be done in the Data Warehousing Workbench.
  Check for Dependencies: Ensure that any dependent objects (like InfoObjects, InfoProviders, etc.) are also updated to reflect the changes in the extraction structure.
  Test Data Extraction: After making the necessary adjustments, perform a test extraction to ensure that data can be successfully extracted without errors.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like RSA1 (Data Warehousing Workbench) or RSO2 (Maintain DataSource) to manage and troubleshoot DataSources and extraction structures.
  Documentation: Refer to SAP documentation or notes related to the specific extraction structure for detailed guidance on handling changes.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional solutions related to the MCEX145 error.
  
  By following these steps, you should be able to resolve the MCEX145 error and ensure that your data extraction processes function correctly.