How To Fix /STMC/CR_MSG863 - Error while generating cache; navigation contains too many screens

SAP Error Message - Details

• Message type: E = Error

• Message class: /STMC/CR_MSG -

• Message number: 863

• Message text: Error while generating cache; navigation contains too many screens

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /STMC/CR_MSG863 - Error while generating cache; navigation contains too many screens ?

  The SAP error message /STMC/CR_MSG863 indicates that there is an issue with generating a cache due to the navigation structure containing too many screens. This typically occurs in the context of SAP's Business Warehouse (BW) or BusinessObjects environments, where the navigation structure is complex and exceeds certain limits.
  Cause:
  
  Too Many Navigation Screens: The error is primarily caused by having an excessive number of navigation screens in a single query or report. This can happen if the query is designed to pull data from multiple InfoProviders or if there are too many characteristics and key figures involved.
  System Limitations: SAP has certain limitations on the number of navigational attributes or screens that can be processed at once. When these limits are exceeded, the system cannot generate the required cache.
  Complex Queries: Queries that involve complex calculations, multiple joins, or extensive hierarchies can also lead to this error.
  
  Solution:
  
  Simplify the Query: Review the query design and try to simplify it by reducing the number of navigational attributes or screens. Consider breaking down complex queries into smaller, more manageable ones.
  Limit Characteristics: Reduce the number of characteristics used in the query. Focus on the most relevant ones to minimize complexity.
  Use Variables: Implement variables to limit the data being pulled into the query. This can help in reducing the number of screens generated.
  Check for Redundant InfoProviders: Ensure that you are not pulling data from multiple InfoProviders unnecessarily. Consolidate where possible.
  Adjust Cache Settings: If applicable, review and adjust the cache settings in the BW system to accommodate larger queries, though this may not always be a viable solution.
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address this issue. Sometimes, SAP releases patches or notes that provide specific fixes or workarounds for known issues.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for guidelines on query design and performance optimization.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Performance Tuning: Consider performance tuning techniques for BW queries, which can help in optimizing the overall performance and may alleviate some of the issues leading to this error.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further analysis and support.