How To Fix CN281 - Missing material for network &

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 281

• Message text: Missing material for network &

What causes this issue?

During the check the system has determined that material components
will not be available on the required date.

How to fix this error?

To determine which material components are not available, call
up the error log using the menu options <LB>Extras -> Logs</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN281 - Missing material for network & ?

  The SAP error message CN281 ("Missing material for network &") typically occurs in the context of project management and network planning within the SAP system, particularly in the Project System (PS) module. This error indicates that a required material is not assigned to a network activity, which is essential for the execution of that activity.
  Cause:
  
  Missing Material Assignment: The most common cause is that the network activity does not have a material assigned to it, which is necessary for the activity to be executed.
  Incorrect Configuration: There may be configuration issues in the project or network settings that prevent the assignment of materials.
  Material Master Data Issues: The material may not exist in the system, or it may not be properly set up in the material master.
  Network Activity Status: The status of the network activity may not allow for material assignment (e.g., if the activity is already completed or closed).
  
  Solution:
  
  
  Assign Material: 
  
  Go to the network activity in question and check if a material is assigned. If not, assign the required material to the activity.
  You can do this by navigating to the network in the SAP GUI, selecting the relevant activity, and then using the "Assign Material" function.
  
  
  
  Check Material Master:
  
  Ensure that the material you are trying to assign exists in the system and is correctly configured in the material master.
  Verify that the material is relevant for the project and network activities.
  
  
  
  Review Network Configuration:
  
  Check the configuration settings for the network and project to ensure that they allow for material assignments.
  Ensure that the network type supports material assignments.
  
  
  
  Check Activity Status:
  
  Verify the status of the network activity. If the activity is already completed or closed, you may need to reopen it or create a new activity to assign the material.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or help resources for additional guidance on managing materials in networks.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CN21 (Create Network), CN22 (Change Network), or CN41 (Display Network) to manage networks and activities.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to networks and materials.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in the Project System module.