How To Fix MC820 - Technical layout & & matches technical layout of proxy view &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 820

• Message text: Technical layout & & matches technical layout of proxy view &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MC820 - Technical layout & & matches technical layout of proxy view & ?

  The SAP error message MC820 typically indicates an issue related to the technical layout of a data source or a proxy view in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence). This error can occur when there is a mismatch between the expected technical layout of a data source and the actual layout defined in the system.
  Cause:
  
  
  Mismatch in Data Source Structure: The structure of the data source (e.g., InfoObject, DataSource) does not match the expected structure defined in the system. This can happen if there have been changes to the underlying data model or if the data source has not been properly activated after changes.
  
  
  Proxy View Issues: If you are using a proxy view, the technical layout of the proxy view may not align with the data source it is supposed to represent. This can occur if the proxy view has not been updated or if there are inconsistencies in the mapping.
  
  
  Transport Issues: If the data source or related objects were transported from one system to another (e.g., from development to production), there may be inconsistencies in the technical layout due to missing or incomplete transport requests.
  
  
  Solution:
  
  
  Check Data Source Structure: Verify the structure of the data source in the SAP system. Ensure that all fields, data types, and attributes match the expected technical layout. You can do this by comparing the data source definition with the actual data in the underlying tables.
  
  
  Re-activate Data Source: If changes have been made to the data source, try reactivating it. This can often resolve issues related to technical layout mismatches. You can do this in the Data Warehousing Workbench (transaction RSA1).
  
  
  Update Proxy View: If you are using a proxy view, ensure that it is updated to reflect the current structure of the data source. You may need to regenerate the proxy view or adjust its settings.
  
  
  Check Transport Requests: If the issue arose after a transport, check the transport requests to ensure that all necessary objects were included and that there were no errors during the transport process.
  
  
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error message. SAP frequently updates its knowledge base with solutions for common issues.
  
  
  Debugging: If the issue persists, consider debugging the process to identify the exact point of failure. This may require technical expertise in ABAP or BW.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSO2 (DataSource Maintenance), and RSO3 (DataSource Activation).
  SAP Community: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  Documentation: Review SAP documentation related to data sources, proxy views, and error handling in BW/BI for more detailed guidance.
  
  If the problem continues after trying these solutions, it may be beneficial to consult with your SAP Basis or BW team for further assistance.