How To Fix FDT_CORE850 - Operation &1 is not allowed during LUW Mode

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 850

• Message text: Operation &1 is not allowed during LUW Mode

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE850 - Operation &1 is not allowed during LUW Mode ?

  The SAP error message FDT_CORE850 with the description "Operation &1 is not allowed during LUW Mode" typically occurs in the context of the SAP Fiori or SAP Gateway framework, particularly when dealing with the handling of data in a Logical Unit of Work (LUW) mode. This error indicates that a certain operation (denoted by &1) is not permitted while the system is in LUW mode, which is a transactional state where changes are being processed.
  Cause:
  
  LUW Mode: The error arises when an operation that is not compatible with the LUW mode is attempted. This could be due to trying to perform actions like committing or rolling back transactions, or executing certain types of data manipulations that are restricted during a transaction.
  Incorrect API Usage: The error may also occur if the API or function module being called is not designed to be executed in LUW mode.
  Concurrency Issues: If multiple processes are trying to access or modify the same data simultaneously, it can lead to conflicts that trigger this error.
  
  Solution:
  
  Check Operation Validity: Review the operation you are trying to perform (indicated by &1 in the error message) and ensure that it is valid in LUW mode. Refer to the SAP documentation for the specific API or function module to understand its constraints.
  Adjust Transaction Logic: If your logic requires performing operations that are not allowed in LUW mode, consider restructuring your code to perform these operations outside of the LUW context. This may involve committing or rolling back transactions before executing the restricted operation.
  Error Handling: Implement proper error handling in your code to catch this error and respond appropriately, such as retrying the operation after exiting LUW mode.
  Debugging: Use debugging tools to trace the execution flow and identify where the error is being triggered. This can help you pinpoint the exact operation causing the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review the official SAP documentation for the specific module or API you are working with to understand the constraints and best practices for handling transactions.
  Community Forums: Engage with the SAP community forums or support channels to see if others have encountered similar issues and what solutions they have found.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the context in which the error occurs.