How To Fix MC818 - Checking technical layout & & against proxy view &

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 818

• Message text: Checking technical layout & & against proxy view &

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MC818 - Checking technical layout & & against proxy view & ?

  The SAP error message MC818 typically occurs in the context of the SAP system when there is an issue with the technical layout of a data source or a query. This error is often related to the extraction of data from a source system, particularly in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence).
  Cause of Error MC818
  The error message MC818 indicates that there is a mismatch or inconsistency between the technical layout of the data source and the proxy view that is being used. This can happen due to several reasons:
  
  
  Changes in Data Source: If the structure of the data source has been changed (e.g., fields added, removed, or modified) but the corresponding proxy view has not been updated, this can lead to inconsistencies.
  
  
  Incorrect Mapping: The mapping between the data source and the proxy view may not be correctly defined, leading to discrepancies in the expected data structure.
  
  
  Transport Issues: If changes were transported from one system to another (e.g., from development to production) and the transport did not include all necessary objects, this can cause the error.
  
  
  Version Mismatch: If there are different versions of the data source and the proxy view, this can lead to compatibility issues.
  
  
  Solution to Error MC818
  To resolve the MC818 error, you can follow these steps:
  
  
  Check Data Source and Proxy View: Verify the technical layout of the data source and the proxy view. Ensure that they are aligned in terms of structure and fields.
  
  
  Update Proxy View: If there have been changes to the data source, update the proxy view accordingly. This may involve regenerating the proxy view or adjusting the mappings.
  
  
  Transport Consistency: Ensure that all necessary objects have been transported correctly. Check the transport logs for any errors or warnings.
  
  
  Re-activate Objects: Sometimes, re-activating the data source and the proxy view can resolve inconsistencies. This can be done in the SAP GUI.
  
  
  Check for Notes and Patches: Look for any SAP Notes or patches that may address known issues related to this error. Applying relevant updates can sometimes resolve underlying problems.
  
  
  Consult Documentation: Review SAP documentation or help resources for any specific guidance related to the error message MC818.
  
  
  Related Information
  
  Transaction Codes: You may need to use transaction codes like RSA1 (Data Warehousing Workbench) to check the data source and proxy view.
  SAP Notes: Search the SAP Support Portal for notes related to MC818 for any specific fixes or recommendations.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further investigation.