How To Fix U6156 - Solution &1: &2 is not a valid ABAP function module

U6156 - Overview

• Message type: E = Error

• Message class: U6 - Message Class for BRE

• Message number: 156

• Message text: Solution &1: &2 is not a valid ABAP function module

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

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U6156 - Details

• The SAP error message U6156 indicates that the specified ABAP function module is not valid or cannot be found in the system. This error can occur for various reasons, and understanding the cause and potential solutions can help resolve the issue.
  Causes of Error U6156
  
  
  Non-Existent Function Module: The function module you are trying to call does not exist in the SAP system. This could be due to a typo in the function module name or because it has not been created or activated.
  
  
  Transport Issues: If the function module was recently transported from another system, it may not have been successfully imported or activated in the target system.
  
  
  Authorization Issues: The user executing the function may not have the necessary authorizations to access the function module.
  
  
  Namespace Issues: If the function module is in a specific namespace and the calling program does not have access to that namespace, it may lead to this error.
  
  
  System