How To Fix FL390 - Navigation is not supported for ABAP internal types

FL390 - Overview

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 390

• Message text: Navigation is not supported for ABAP internal types

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?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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 FL390 - Navigation is not supported for ABAP internal types ?

  The SAP error message FL390, which states "Navigation is not supported for ABAP internal types," typically occurs when you are trying to navigate or perform certain operations on data types that are not supported for navigation in the SAP GUI or in the context of the application you are using. This often happens in the context of using the SAP Fiori interface or when working with certain ABAP data types that do not have a corresponding representation in the user interface.
  
  Cause:
  
  Unsupported Data Types: The error is primarily caused by attempting to navigate to or display ABAP internal types (like structures, tables, or other complex data types) that do not have a direct representation in the user interface.
  Incorrect Data Handling: If the application is trying to handle data in a way that is not supported by the underlying data model or the user interface framework, this error can occur.
  
  Configuration Issues: Sometimes,