How To Fix B0166 - Function & is not defined

B0166 - Overview

• Message type: E = Error

• Message class: B0 - Business Partner General

• Message number: 166

• Message text: Function & is not defined

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.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message B0166 - Function & is not defined ?

  The SAP error message B0166, which states "Function & is not defined," typically indicates that the system is unable to find a specific function module, method, or procedure that is being called in the program or transaction you are executing. This can occur for several reasons:
  Causes:
  
  Missing Function Module: The function module or method being called does not exist in the system. This could be due to a missing transport or an incomplete installation.
  Typographical Error: There may be a typo in the function name in the code or configuration.
  Authorization Issues: The user executing the transaction may not have the necessary authorizations to access the function.
  Namespace Issues: If the function is part of a custom namespace, it may not be properly defined or activated.
  Version Compatibility: The function may not be available in the version of SAP you are using, especially if it was introduced in a later version.
  
  Solutions:
  
  Check Function Module Existence: Use