How To Fix C1158 - Check table & has no key fields

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 158

• Message text: Check table & has no key fields

What causes this issue?

Check table &v1& has no key fields, so it is not possible to check
values.

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?

Please enter a check table that has exactly one key field, and a
client, if required.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1158 - Check table & has no key fields ?

  The SAP error message C1158, which states "Check table & has no key fields," typically occurs when you are trying to create or modify a check table in the SAP system, and the system detects that the check table does not have any key fields defined. This is a critical issue because check tables are used to enforce referential integrity in the database, and they must have at least one key field to function properly.
  Cause:
  
  No Key Fields Defined: The primary cause of this error is that the check table you are working with does not have any fields defined as key fields. In SAP, a check table must have at least one key field to be valid.
  Incorrect Table Configuration: The table may have been incorrectly configured or created without specifying key fields.
  Data Dictionary Issues: There may be issues in the data dictionary where the table definition is not correctly set up.
  
  Solution:
  To resolve the C1158 error, you need to ensure that the check table has at least one key field defined. Here are the steps to do this:
  
  
  Access the Data Dictionary:
  
  Go to transaction code SE11 (Data Dictionary).
  
  
  
  Find the Check Table:
  
  Enter the name of the check table that is causing the error and click on "Display."
  
  
  
  Edit the Table:
  
  Click on the "Change" button to edit the table definition.
  
  
  
  Define Key Fields:
  
  In the "Fields" tab, select one or more fields that should serve as key fields for the check table.
  Mark these fields as key fields by checking the "Key" checkbox.
  
  
  
  Save and Activate:
  
  After defining the key fields, save your changes and activate the table.
  
  
  
  Check Dependencies:
  
  If the check table is used in other database objects (like foreign key relationships), ensure that those dependencies are also correctly defined.
  
  
  
  Related Information:
  
  Check Tables: Check tables are used in conjunction with foreign key relationships to ensure that the values in a field correspond to valid entries in another table.
  Foreign Key Relationships: When defining foreign key relationships, ensure that the referenced check table has the appropriate key fields.
  SAP Documentation: For more detailed information, refer to SAP's official documentation or help resources related to Data Dictionary and table definitions.
  
  By following these steps, you should be able to resolve the C1158 error and ensure that your check table is correctly configured with key fields.