How To Fix AM851 - Function module & must not be called during simulation mode

SAP Error Message - Details

• Message type: E = Error

• Message class: AM - Business Address Services

• Message number: 851

• Message text: Function module & must not be called during simulation mode

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message AM851 - Function module & must not be called during simulation mode ?

  The SAP error message AM851 indicates that a specific function module is being called in simulation mode, which is not allowed. This typically occurs in the context of Asset Accounting (FI-AA) when trying to execute certain operations that are not permitted in simulation mode.
  Cause:
  The error arises when a function module that is intended for actual processing (like posting or updating records) is invoked while the system is in simulation mode. Simulation mode is used for testing purposes, allowing users to see what would happen without making any actual changes to the database. However, some function modules are designed to perform actions that require real data changes and cannot be executed in this mode.
  Solution:
  To resolve the AM851 error, you can take the following steps:
  
  
  Check the Mode: Ensure that you are not in simulation mode when calling the function module. If you are running a transaction or report, make sure to execute it in the actual mode rather than simulation.
  
  
  Review the Code: If you are developing or modifying a program that calls the function module, check the logic to ensure that it does not inadvertently enter simulation mode. Look for any flags or parameters that might be set to enable simulation.
  
  
  Use the Correct Function Module: If you need to perform a simulation, ensure that you are using the appropriate function module designed for simulation purposes. Some function modules have counterparts that are specifically meant for simulation.
  
  
  Debugging: If you are unsure why the function module is being called in simulation mode, you can use the debugger to trace the execution flow and identify where the simulation mode is being set.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific function module you are using to understand its requirements and limitations regarding simulation mode.
  
  
  Related Information:
  
  Function Modules: Familiarize yourself with the specific function module that is causing the error. Check its documentation for details on its parameters and expected usage.
  Transaction Codes: If this error occurs during a specific transaction, check the transaction code and its settings to ensure it is configured correctly for your needs.
  SAP Notes: Search for relevant SAP Notes that may address this error or provide additional context or solutions.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to resolve the AM851 error and successfully execute the desired operations in SAP.