How To Fix PAK128 - Development element cannot be added to package interface

SAP Error Message - Details

• Message type: E = Error

• Message class: PAK - Package API / Package Tools

• Message number: 128

• Message text: Development element cannot be added to package interface

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PAK128 - Development element cannot be added to package interface ?

  The SAP error message PAK128, which states "Development element cannot be added to package interface," typically occurs when there is an attempt to add a development object (like a function module, class, or method) to a package interface that is not allowed due to certain restrictions or conditions.
  Causes:
  
  
  Incorrect Package Type: The package you are trying to add the development element to may not be a proper package interface. Package interfaces are special types of packages that are used to define the interface of a package.
  
  
  Development Class Restrictions: The development class (package) may have restrictions on what types of objects can be added to its interface. For example, certain types of objects may not be allowed in a package interface.
  
  
  Transport Layer Issues: If the package is part of a transport layer that has specific rules or restrictions, this could prevent the addition of certain elements.
  
  
  Missing Authorization: The user may not have the necessary authorizations to modify the package interface.
  
  
  Object Type Restrictions: Some object types may not be allowed to be included in the package interface due to system settings or configurations.
  
  
  Solutions:
  
  
  Check Package Type: Ensure that the package you are trying to add the development element to is indeed a package interface. You can check this in the package attributes.
  
  
  Review Package Interface Settings: Go to the package interface settings and verify if the object type you are trying to add is allowed. You may need to consult with your SAP Basis or development team for specific package settings.
  
  
  Authorization Check: Ensure that you have the necessary authorizations to modify the package interface. You may need to contact your system administrator to verify your permissions.
  
  
  Use Correct Object Types: Make sure that the object you are trying to add is of a type that is permitted in the package interface. If it is not, consider creating a new package or modifying the existing one to accommodate the object.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on package interfaces and the types of objects that can be included.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  Package Interface: A package interface is a special type of package in SAP that defines the public interface of a package. It allows other packages to access certain development objects.
  Development Objects: These can include function modules, classes, methods, and other elements that are part of the ABAP development environment.
  Transport Management System (TMS): Understanding how transport layers and packages work in TMS can help in resolving issues related to package interfaces.
  
  By following these steps and understanding the context of the error, you should be able to resolve the PAK128 error effectively.