How To Fix C1046 - Enter either a check table or a function module

C1046 - Overview

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 046

• Message text: Enter either a check table or a function module

What causes this issue?

You have entered both a check table and a function module. You can
check values against either a check table or a function module, but not
both.

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?

Delete one of your entries.

Error message extract from SAP system. Copyright SAP SE.

C1046 - Details

• The SAP error message C1046, which states "Enter either a check table or a function module," typically occurs in the context of data dictionary operations, particularly when working with table maintenance or when defining foreign key relationships in the ABAP Dictionary.
  
  Cause:
  This error usually arises when:
  
  You are trying to create or modify a table or a view, and the system expects you to specify either a check table or a function module for a foreign key relationship.
  The required fields for defining a foreign key are not properly filled in, leading to ambiguity in the definition.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Foreign Key Settings:
  
  Go to the Data Dictionary (transaction SE11).
  Open the table or view that is causing the error.
  Navigate to the "Foreign Keys" tab.
  Ensure that you have specified a valid check table or function module. If you are defining a foreign key, you need to select a check table