How To Fix PAK155 - Package interface &1 has an invalid type

SAP Error Message - Details

• Message type: E = Error

• Message class: PAK - Package API / Package Tools

• Message number: 155

• Message text: Package interface &1 has an invalid type

What causes this issue?

At structure package level, only package interfaces of other structure
packages can be used for use accesses:
Filter package interfaces
Virtual standard package interfaces
Standard package interfaces
Package interface &V1& does not belong to a structure package and
therefore cannot be used here.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PAK155 - Package interface &1 has an invalid type ?

  The SAP error message PAK155 indicates that there is an issue with the package interface in your SAP system. Specifically, it means that the package interface you are trying to use has an invalid type. This can occur in various scenarios, such as when working with ABAP packages, transport requests, or during the development of custom programs.
  Cause:
  
  Invalid Package Type: The package interface you are trying to use may not be defined correctly or is of an unsupported type.
  Transport Issues: If the package is part of a transport request, it may not have been imported correctly, leading to inconsistencies.
  Development Errors: There may be errors in the ABAP code or configuration that reference the package interface incorrectly.
  Missing Dependencies: The package may depend on other packages or objects that are not available or have been deleted.
  
  Solution:
  
  Check Package Definition: Verify the definition of the package interface in transaction SE80 or SE21. Ensure that the package is correctly defined and that its type is valid.
  Review Transport Requests: If the issue arose after a transport, check the transport logs for any errors. You may need to re-import the transport or resolve any issues indicated in the logs.
  Correct ABAP Code: If you are developing ABAP code that references the package interface, review the code for any mistakes. Ensure that you are using the correct package name and type.
  Dependencies: Check for any missing dependencies. Ensure that all required packages and objects are available in the system.
  Consult Documentation: Refer to SAP documentation or notes related to the specific package or interface you are working with for any known issues or updates.
  
  Related Information:
  
  Transaction Codes: SE80 (Object Navigator), SE21 (Transport Organizer), SE37 (Function Builder), SE11 (Data Dictionary).
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider checking SAP Community forums or other developer forums for similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to your SAP Basis or development team for further assistance.