CO406 - Fill all key fields (&)

SAP Error Message - Details

• Message type: E = Error

• Message class: CO - PPC order processing messages

• Message number: 406

• Message text: Fill all key fields (&)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CO406 - Fill all key fields (&) ?

  The SAP error message CO406 "Fill all key fields (&)" typically occurs in the context of controlling (CO) module transactions, particularly when you are trying to create or modify a cost object, such as a cost center, internal order, or project. This error indicates that certain mandatory fields that are required for the transaction have not been filled in.
  Cause:
  The error is triggered when the system detects that one or more key fields that are necessary for the transaction are missing or incomplete. Key fields can include:
  
  Cost Center
  Internal Order
  Activity Type
  Version
  Fiscal Year
  Period
  Other relevant identifiers depending on the specific transaction
  
  Solution:
  To resolve the CO406 error, follow these steps:
  
  
  Identify Missing Fields: Review the transaction screen where the error occurred and identify which key fields are highlighted or indicated as missing. The error message may provide hints about which fields need to be filled.
  
  
  Fill in Required Fields: Ensure that all mandatory fields are filled in correctly. This may involve:
  
  Entering a valid cost center or internal order.
  Specifying the correct fiscal year and period.
  Providing any other required identifiers.
  
  
  
  Check Field Validity: Make sure that the values entered in the key fields are valid and exist in the system. For example, if you are entering a cost center, ensure that it is active and correctly configured in the system.
  
  
  Review Configuration: If you are unsure about which fields are mandatory, consult your SAP configuration or documentation. Sometimes, the configuration settings may dictate which fields are required based on the specific transaction or business process.
  
  
  Consult with Colleagues or Support: If you are still unable to resolve the issue, consider reaching out to a colleague or your SAP support team for assistance. They may have insights into specific configurations or common issues related to the error.
  
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes related to controlling, such as KO01 (Create Internal Order), KOT2 (Change Internal Order), or others.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message CO406.
  Documentation: Refer to SAP Help documentation for detailed information on the specific transaction you are working with, as it may provide additional context on required fields.
  
  By ensuring that all necessary key fields are filled out correctly, you should be able to resolve the CO406 error and proceed with your transaction.