How To Fix IW811 - More than one person has already been assigned to this operation

SAP Error Message - Details

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 811

• Message text: More than one person has already been assigned to this operation

What causes this issue?

More than one person has already been assigned to this operation
(operation &v1&).

System Response

The system only displays the first assignment.

How to fix this error?

To change the assignment, you use the requirements assignment screen
for the operation.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IW811 - More than one person has already been assigned to this operation ?

  The SAP error message IW811 ("More than one person has already been assigned to this operation") typically occurs in the context of work order management within the SAP system, particularly in the Plant Maintenance (PM) or Production Planning (PP) modules. This error indicates that an operation in a work order has already been assigned to multiple persons, which is not allowed in the system.
  Cause:
  
  Multiple Assignments: The primary cause of this error is that the operation in question has already been assigned to one or more persons. SAP does not allow more than one person to be assigned to the same operation simultaneously.
  Data Entry Error: It may also occur due to incorrect data entry or configuration settings that allow for multiple assignments.
  System Configuration: The system may be configured in a way that does not permit multiple assignments for specific operations.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Navigate to the work order in question and check the operations assigned to it. Look for any existing assignments to personnel.
  You can do this by going to the work order (transaction IW32) and reviewing the operations tab.
  
  
  
  Remove Duplicate Assignments:
  
  If you find that multiple persons are assigned to the same operation, you will need to remove the duplicate assignments. You can do this by selecting the operation and deleting the unnecessary assignments.
  
  
  
  Reassign Personnel:
  
  After ensuring that only one person is assigned to the operation, you can proceed to assign the desired personnel to the operation.
  
  
  
  Review Configuration:
  
  If this issue occurs frequently, it may be worth reviewing the configuration settings in the SAP system to ensure that they align with your business processes. Consult with your SAP administrator or a functional consultant if necessary.
  
  
  
  User Training:
  
  Ensure that users are trained on the correct procedures for assigning personnel to operations to prevent this error from occurring in the future.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  IW32: Change Work Order
  IW31: Create Work Order
  IW33: Display Work Order
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Refer to SAP documentation or user manuals for detailed instructions on managing work orders and operations.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant for further investigation.