How To Fix PSI_LEAN_MSGCL003 - You cannot add a WBS subtree

SAP Error Message - Details

• Message type: E = Error

• Message class: PSI_LEAN_MSGCL -

• Message number: 003

• Message text: You cannot add a WBS subtree

What causes this issue?

You cannot add a WBS subtree because the <LS>SD/PS Assignment</>
checkbox (in the master data of the standard project) is not selected.
For more information about SD/PS assignment, see <DS> <DS:DE.PS_FLGSD>
Indicator: New structure for each sales order item</></>.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PSI_LEAN_MSGCL003 - You cannot add a WBS subtree ?

  The SAP error message PSI_LEAN_MSGCL003, which states "You cannot add a WBS subtree," typically occurs in the context of project management within SAP, particularly when dealing with Work Breakdown Structures (WBS). This error indicates that there is an issue preventing the addition of a WBS subtree to the existing structure.
  Causes:
  
  Incorrect Project Status: The project or WBS element may be in a status that does not allow changes. For example, if the project is closed or locked, you cannot add new elements.
  Hierarchy Restrictions: There may be restrictions on the hierarchy level where you are trying to add the subtree. Certain levels may not allow the addition of new WBS elements.
  Authorization Issues: The user may not have the necessary authorizations to modify the WBS structure.
  System Configuration: There may be specific configuration settings in the project system that prevent the addition of new WBS elements.
  Missing Dependencies: If the WBS element you are trying