How To Fix UD639 - Mark at least one DD object before performing the function

UD639 - Overview

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 639

• Message text: Mark at least one DD object before performing the function

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 UD639 - Mark at least one DD object before performing the function ?

  The SAP error message UD639, which states "Mark at least one DD object before performing the function," typically occurs in the context of data dictionary (DD) operations, such as when you are trying to perform an action that requires at least one data dictionary object to be selected or marked.
  
  Cause:
  This error usually arises when you attempt to execute a function that requires you to select or mark at least one data dictionary object (like a table, view, or structure) in the SAP Data Dictionary (transaction SE11 or similar). If no objects are marked, the system cannot proceed with the operation, leading to this error message.
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Open the Relevant Transaction: Go to the transaction where you encountered the error (e.g., SE11 for Data Dictionary).
  
  
  Select or Mark an Object: Ensure that you have selected or marked at least one data dictionary object. This could be a table,