How To Fix DMCLG401 - Header table &2 is already included in mass transfer &1

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 401

• Message text: Header table &2 is already included in mass transfer &1

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 DMCLG401 - Header table &2 is already included in mass transfer &1 ?

  The SAP error message DMCLG401 indicates that there is an issue with the mass transfer process in the Data Migration Cockpit (DMC) or similar data transfer tools. Specifically, it means that the header table you are trying to include in a mass transfer process is already part of another mass transfer process.
  Cause:
  
  Duplicate Inclusion: The header table (denoted as &2) is already included in another mass transfer process (denoted as &1). This can happen if you attempt to add the same table to multiple mass transfer processes simultaneously.
  Configuration Issues: There may be configuration settings or data transfer rules that are causing the same table to be referenced multiple times.
  Session Management: If multiple users or sessions are trying to access or modify the same mass transfer process, it can lead to conflicts.
  
  Solution:
  
  Check Existing Mass Transfer Processes: Review the existing mass transfer processes to see if the header table is already included. You can do this by navigating to the relevant transaction or application where mass transfers are managed.
  Remove Duplicate Entries: If you find that the header table is included in another mass transfer process, you may need to remove it from that process if it is not needed there.
  Use a Different Mass Transfer Process: If you need to include the header table in a new mass transfer process, consider creating a new process that does not conflict with existing ones.
  Consult Documentation: Review SAP documentation or notes related to mass transfer processes for any specific guidelines or limitations regarding the inclusion of header tables.
  Check User Sessions: Ensure that no other users are trying to modify the same mass transfer process at the same time, which could lead to conflicts.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LSMW (Legacy System Migration Workbench) or other data migration tools that may be in use.
  SAP Notes: Search for SAP Notes related to the DMCLG401 error for any patches or updates that may address this issue.
  Data Migration Best Practices: Review best practices for data migration in SAP to avoid similar issues in the future, such as proper session management and planning of mass transfer processes.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.