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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1046 - Enter either a check table or a function module ?

  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 that contains the valid values for the foreign key field.
  
  
  
  Define a Check Table:
  
  If you do not have a check table defined, you will need to create one. A check table is typically a table that contains the valid entries for a foreign key.
  Create a new table (transaction SE11) and define the necessary fields and primary key.
  
  
  
  Use a Function Module:
  
  If your design requires a function module instead of a check table, ensure that you have created a function module that can validate the foreign key relationship.
  You can create a function module in transaction SE37 and implement the necessary logic to check the validity of the foreign key.
  
  
  
  Check for Syntax Errors:
  
  Ensure that there are no syntax errors in the definitions of the tables or function modules involved.
  
  
  
  Transport Requests:
  
  If you are working in a development environment, ensure that your changes are included in a transport request if you plan to move them to a different environment.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SE11: Data Dictionary
  SE37: Function Module
  SE80: Object Navigator
  
  
  
  Documentation:
  
  Refer to SAP Help documentation for detailed information on Data Dictionary and foreign key relationships.
  
  
  
  SAP Notes:
  
  Check SAP Notes for any specific issues related to your version of SAP that might provide additional context or solutions.
  
  
  
  By following these steps, you should be able to resolve the C1046 error and successfully define your foreign key relationships in SAP.