How To Fix VC2OD_DMT_ASSIST028 - You cannot add a line; the line you select is read-only

VC2OD_DMT_ASSIST028 - Overview

• Message type: E = Error

• Message class: VC2OD_DMT_ASSIST - Message Class for Dependency Maintenance Table

• Message number: 028

• Message text: You cannot add a line; the line you select is read-only

Self-Explanatory Message

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VC2OD_DMT_ASSIST028 - Details

• The SAP error message VC2OD_DMT_ASSIST028 indicates that you are trying to add a line to a document or a data structure that is currently in a read-only state. This typically occurs in scenarios where the system is preventing modifications to ensure data integrity or because the document is locked for editing.
  Causes:
  
  Document Status: The document you are trying to modify may be in a status that does not allow changes (e.g., completed, approved, or archived).
  User Permissions: Your user role may not have the necessary permissions to edit the document or data structure.
  Locking Mechanism: The document may be locked by another user or process, preventing any modifications.
  Configuration Settings: Certain configurations in the system may enforce read-only access for specific documents or data types.
  
  Solutions:
  
  Check Document Status: Verify the status of the document you are trying to edit. If it is in a completed or locked state, you may need to change its status