How To Fix MC391 - Standard append & for view & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 391

• Message text: Standard append & for view & already exists

What causes this issue?

You decided to create a new <DS:TX.DDDOK_VIEW_APPEND>append view</> for
view &V2&. Normally the system proposes a standard name. In this case
there is already an append view for this view having this standard
name. The system therefore assumes that you do not want to use this
standard append view.

System Response

The system does not make a proposal for the name.

How to fix this error?

Enter a name for the append view. You can also choose the given
standard name.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC391 - Standard append & for view & already exists ?

  The SAP error message MC391, which states "Standard append & for view & already exists," typically occurs when there is an attempt to create or modify a view in the SAP system that already has a standard append structure defined for it. This can happen during the development of custom views or when trying to enhance standard views.
  Cause:
  
  Existing Append Structure: The error indicates that there is already an existing standard append structure for the specified view. This means that the system does not allow the creation of another append structure for the same view.
  Development Environment: This error can occur in a development environment where multiple developers might be trying to enhance the same view simultaneously.
  Transport Issues: If changes are being transported from one system to another (e.g., from development to quality assurance), conflicts can arise if the same append structure is being modified or created in both systems.
  
  Solution:
  
  Check Existing Appends: Verify if there is already an existing append structure for the view in question. You can do this by using transaction SE11 (Data Dictionary) and checking the view definition.
  Use Existing Append: If an append structure already exists, consider using it instead of creating a new one. You can add your fields to the existing append structure if it is appropriate.
  Modify Existing Structure: If you need to add fields, you can modify the existing append structure instead of creating a new one.
  Coordinate with Team: If you are in a team environment, communicate with your colleagues to ensure that no one else is trying to create or modify the same append structure.
  Transport Management: If the issue arises during a transport, ensure that the transport requests are correctly managed and that there are no conflicting changes in the target system.
  
  Related Information:
  
  Transaction Codes: Use SE11 for Data Dictionary, SE80 for Object Navigator, and SE37 for Function Modules to check related objects.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message. You can search for MC391 in the SAP Support Portal.
  Documentation: Review SAP documentation on data dictionary objects and append structures for a better understanding of how they work and how to manage them.
  
  By following these steps, you should be able to resolve the MC391 error and continue with your development work in SAP.