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

AM851 - Overview

• 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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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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AM851 - Details

• 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