How To Fix BK109 - Enter a network number

SAP Error Message - Details

• Message type: E = Error

• Message class: BK - Create, Display, Reverse Controlling Document

• Message number: 109

• Message text: Enter a network number

What causes this issue?

You entered a network activity but forgot to enter the corresponding
network number.

How to fix this error?

Enter the network number belonging to the activity.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BK109 - Enter a network number ?

  The SAP error message BK109, which states "Enter a network number," typically occurs in the context of project management or network planning within the SAP system, particularly in modules like SAP PS (Project System). This error indicates that the system expects a network number to be entered, but it has not been provided.
  Cause:
  
  Missing Network Number: The most common cause of this error is that the user has not entered a network number in the relevant field when trying to create or modify a project or network.
  Incorrect Transaction: The user may be in a transaction that requires a network number but is not providing it.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to view or enter network numbers.
  
  Solution:
  
  Enter a Network Number: Ensure that you enter a valid network number in the required field. If you are unsure of the network number, you can search for it using the search help (F4).
  Check Transaction Context: Make sure you are in the correct transaction that requires a network number. If you are unsure, refer to the documentation or help for the specific transaction.
  Review Authorizations: If you believe you should have access to the network number but are unable to enter it, check with your SAP administrator to ensure you have the necessary authorizations.
  Consult Documentation: If you are still facing issues, refer to the SAP documentation or help files related to the specific module you are working in for more detailed guidance.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes in SAP PS, such as CJ20N (Project Builder) or CN21 (Create Network), where this error might occur.
  User Training: If this error is common among users, consider providing training or documentation to help them understand how to properly enter network numbers.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to your SAP support team for further assistance.