How To Fix E2178 - Enter foreign key field

E2178 - Overview

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 178

• Message text: Enter foreign key field

What causes this issue?

The field assignment in the foreign key definition is incomplete. A
foreign key field was not defined for a field of the check table.

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

System Response

How to fix this error?

Enter a foreign key field in columns <ZH>
<ZK>For.key table</></> and <ZH><ZK>Foreign key field</></> or mark the
foreign key as partial (by setting the <LS>generic</> flag) or constant
(by entering a constant enclosed in apostrophes in field <LS>Constant
</>).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E2178 - Enter foreign key field ?

  The SAP error message E2178, "Enter foreign key field," typically occurs when you are trying to enter data in a field that is supposed to reference a foreign key, but the required foreign key field is not filled in or is missing. This error is common in scenarios where data integrity is enforced through foreign key relationships in the database.
  
  Cause:
  
  Missing Foreign Key Value: The field that is supposed to hold a foreign key reference is empty or not filled in.
  Incorrect Data Entry: The data entered does not match the expected foreign key values defined in the related table.
  
  Configuration Issues: There may be issues with the configuration of the foreign key relationships in the database schema.
  
  
  Solution:
  
  Check Required Fields: Ensure that all required fields, especially those that are foreign keys, are filled in correctly. Look for any fields that are marked as mandatory.
  Enter Valid Foreign Key Values: Make sure that the value