How To Fix CN304 - Unit & is not allowed as a business unit

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 304

• Message text: Unit & is not allowed as a business unit

What causes this issue?

You are maintaining the (purchasing) order unit for an external
activity or a service activity.
This unit has not been defined as a commercial unit in Customizing.
Only commercial units are allowed for purchase requisitions in
purchasing.

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Change the Customizing settings or choose a valid unit.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN304 - Unit & is not allowed as a business unit ?

  The SAP error message CN304 indicates that a specific unit of measure (UoM) is not allowed to be used as a business unit in the context of a particular transaction or configuration. This error typically arises in the context of project management or controlling modules, where certain units of measure are expected to be used for specific business processes.
  Cause:
  
  Incorrect Unit of Measure: The unit of measure being used is not defined as a valid business unit in the system.
  Configuration Issues: The configuration settings in the SAP system may not allow the specified unit of measure to be used in the context of the transaction.
  Master Data Issues: The master data for the project or cost center may not be set up correctly, leading to the use of an invalid unit of measure.
  
  Solution:
  
  Check Unit of Measure: Verify that the unit of measure you are trying to use is valid for the business unit in question. You can do this by checking the configuration settings in the SAP system.
  Review Configuration: Go to the configuration settings for the relevant module (e.g., Project System, Controlling) and ensure that the unit of measure is allowed for the business unit you are working with.
  Update Master Data: If the unit of measure is not correctly set up in the master data, update the relevant master data records (e.g., project definitions, cost centers) to include the correct unit of measure.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on allowed units of measure for your business processes.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use specific transaction codes to check or update configuration settings (e.g., OX19 for unit of measure settings).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  User Roles and Authorizations: Ensure that you have the necessary authorizations to make changes to the configuration or master data.
  
  By following these steps, you should be able to identify the cause of the CN304 error and implement the necessary solutions to resolve it.