How To Fix MN449 - Selection dynpro & not defined (internal error)

MN449 - Overview

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 449

• Message text: Selection dynpro & not defined (internal error)

What causes this issue?

Dynpro &V1& should have been called for the selection of
<GL:arrangement>rebate arrangements</>. However, the dynpro does not
exist.

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?

Function module 'MM_ARRANG_SELECT_ARRANGEMENTS' was called with an
invalid parameter (internal error).
Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN449 - Selection dynpro & not defined (internal error) ?

  The SAP error message MN449 "Selection dynpro & not defined (internal error)" typically occurs when there is an issue with the selection screen (dynpro) that is expected to be displayed for a particular transaction or report. This error indicates that the system is unable to find the appropriate selection screen for the program or transaction you are trying to execute.
  Causes:
  
  Missing or Incorrect Dynpro Definition: The selection screen (dynpro) for the program may not be defined correctly in the ABAP code or may be missing entirely.
  Program or Transaction Issues: The program or transaction you are trying to run may have been modified or not properly activated.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access the selection screen.
  Transport Issues: If the program was transported from one system to another, the selection screen might not have been included in the transport request.
  Custom Development: If the program is a custom