How To Fix WA451 - Enter a receiver type

WA451 - Overview

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 451

• Message text: Enter a receiver type

What causes this issue?

The <DS:GLOS.3526B0E3AFAB52B9E10000009B38F974>type linkage</> links an
event of an object to a particular receiver. The relevant receiver type
is not defined, however.
Alternatively, the receiver type can be determined dynamically at
runtime. The receiver type function module required is not defined,
however.

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?

Enter the receiver type (for example a workflow). Alternatively, you
can specify the receiver type function module, which can be used to
determine the receiver type dynamically at runtime.

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 WA451 - Enter a receiver type ?

  SAP Error Message:
  WA451 - Enter a receiver type
  
  
  Cause:
  This error occurs when a required field for the receiver type is left empty during the processing of a message or transaction in SAP. The system expects you to specify the type of receiver (such as a partner function, organizational unit, or user) but it has not been provided.
  Common scenarios include:
  
  In IDoc processing or ALE distribution, the receiver type (e.g., logical system, port, or partner type) is missing.
  In workflow or message determination, the receiver type is not specified.
  In customizing or master data maintenance, the receiver type field is blank where it is mandatory.
  
  
  
  Solution:
  
  Enter the receiver type: Go back to the screen or input where the receiver type is required and fill in the appropriate value.
  Check configuration: If the field is not visible or cannot be filled, check the customizing settings or user exits/enhancements that might be suppressing or incorrectly handling this field.
  Verify partner