How To Fix CN056 - Activity account assignment not allowed for this network

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 056

• Message text: Activity account assignment not allowed for this network

What causes this issue?

You cannot write any costs to the activity for the network whose key
you have maintained.
The costs for the network can only be written to the network header.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

RESET N1
Check that you have maintained the proper key for the network. Make any
necessary changes.
Delete the key for the activity.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN056 - Activity account assignment not allowed for this network ?

  The SAP error message CN056, which states "Activity account assignment not allowed for this network," typically occurs in the context of project systems or network activities in SAP. This error indicates that there is an issue with the account assignment for a specific activity within a network.
  Cause:
  
  Network Structure: The network activity may not be set up to allow account assignments. This can happen if the network is not configured to allow costs to be assigned to specific activities.
  Activity Type Settings: The activity type used in the network may not be configured correctly to allow for account assignments.
  Cost Element: The cost element associated with the activity may not be valid or may not allow for the type of account assignment being attempted.
  Project Profile Settings: The project profile assigned to the project may have restrictions that prevent account assignments for certain activities.
  Authorization Issues: The user may not have the necessary authorizations to perform the account assignment.
  
  Solution:
  
  Check Network Configuration: Review the configuration of the network and ensure that it allows for account assignments. This can be done in the network settings in the project system module.
  Review Activity Type: Ensure that the activity type used in the network is set up correctly and allows for account assignments. You may need to check the settings in the activity type configuration.
  Validate Cost Element: Check the cost element associated with the activity to ensure it is valid and configured to allow account assignments.
  Project Profile Review: Examine the project profile settings to ensure there are no restrictions on account assignments for the activities in the network.
  User Authorizations: Verify that the user has the necessary authorizations to perform the account assignment. This may involve checking roles and permissions in the SAP system.
  Consult Documentation: Refer to SAP documentation or help resources for specific configuration settings related to project systems and network activities.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CN21 (Create Network), CN22 (Change Network), and CJ20N (Project Builder) to review and modify network settings.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on configuration.
  Support: If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By following these steps, you should be able to identify the cause of the CN056 error and implement the necessary solutions to resolve it.