How To Fix CN755 - An alternative account assignment/stock assignment is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 755

• Message text: An alternative account assignment/stock assignment is not possible

What causes this issue?

You want to change the account/stock assignment for a component.

System Response

No account/stock assignment other than the current one is possible.

How to fix this error?

Make the following checks, as appropriate:
For the component: check the secondary requirement indicator in the
material master
For a WBS element: Check stock control in the project definition
For a sales order item: Check that sales order stock exists

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN755 - An alternative account assignment/stock assignment is not possible ?

  The SAP error message CN755, which states "An alternative account assignment/stock assignment is not possible," typically occurs in the context of project management and controlling when there is an issue with the account assignment or stock assignment for a particular transaction. This error can arise in various scenarios, such as when trying to post costs to a project or when attempting to assign costs to a specific cost center or internal order.
  Causes of Error CN755
  
  
  Incorrect Account Assignment: The account assignment you are trying to use may not be valid for the type of transaction you are processing. For example, if you are trying to assign costs to a project that does not allow certain types of account assignments.
  
  
  Missing Configuration: The configuration settings in the system may not allow for alternative account assignments. This could be due to missing settings in the project definition or in the controlling area.
  
  
  Stock Assignment Issues: If the transaction involves stock, there may be issues with the stock type or the valuation class that prevent the assignment from being processed.
  
  
  Project Status: The project or internal order may be in a status that does not allow for further postings or changes.
  
  
  Authorization Issues: The user may not have the necessary authorizations to perform the account assignment or stock assignment.
  
  
  Solutions to Error CN755
  
  
  Check Account Assignment: Verify that the account assignment you are using is valid for the transaction. Ensure that the project or internal order allows for the type of costs you are trying to post.
  
  
  Review Configuration: Check the configuration settings in the project management and controlling modules. Ensure that the project definition allows for alternative account assignments and that all necessary settings are in place.
  
  
  Validate Stock Assignment: If the transaction involves stock, ensure that the stock type and valuation class are correctly set up and that they allow for the assignment you are trying to make.
  
  
  Project Status Check: Review the status of the project or internal order. If it is closed or in a status that does not allow postings, you may need to change the status or create a new project/order.
  
  
  Authorization Check: Ensure that the user has the necessary authorizations to perform the transaction. If not, contact your SAP security administrator to obtain the required permissions.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to the error message and the context in which it occurs.
  
  
  Related Information
  
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), KOB1 (Order Actual Line Items), and others that may help in troubleshooting the issue.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to error CN755. SAP frequently updates its knowledge base with solutions to common problems.
  
  
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  
  By following these steps, you should be able to identify the cause of the CN755 error and implement a suitable solution. If the problem persists, consider reaching out to your SAP support team for further assistance.