How To Fix /ISDFPS/OM261 - Assignment cannot be shifted: start (&1) is after end (&2)

SAP Error Message - Details

• Message type: E = Error

• Message class: /ISDFPS/OM -

• Message number: 261

• Message text: Assignment cannot be shifted: start (&1) is after end (&2)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /ISDFPS/OM261 - Assignment cannot be shifted: start (&1) is after end (&2) ?

  The SAP error message /ISDFPS/OM261 Assignment cannot be shifted: start (&1) is after end (&2) typically occurs in the context of project management or resource planning within SAP, particularly when dealing with assignments in the Project System (PS) or similar modules. This error indicates that there is an attempt to shift an assignment (like a task or resource allocation) in a way that the start date is set to a time that is after the end date, which is logically incorrect.
  Cause:
  
  Incorrect Date Configuration: The start date of the assignment is set later than the end date, which violates the logical sequence of time.
  Data Entry Error: Manual entry of dates may have led to an incorrect configuration.
  System Logic: The system may be trying to adjust dates based on dependencies or constraints that are not properly defined.
  
  Solution:
  
  Check Assignment Dates: Review the start and end dates of the assignment in question. Ensure that the start date is earlier than the end date.
  Adjust Dates: If the dates are incorrect, modify them to ensure that the start date is before the end date.
  Review Dependencies: If the assignment is part of a larger project, check for any dependencies or constraints that might be affecting the dates.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing assignments in your version of SAP.
  Test Changes: After making adjustments, test the changes to ensure that the error no longer occurs.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CJ20N (Project Builder) or CJI3 (Project Actual Line Items) to view and edit project assignments.
  User Authorizations: Ensure that you have the necessary permissions to make changes to project assignments.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide patches related to this error.
  Consult with Colleagues: If you are unsure about the changes, consult with colleagues or a project manager who is familiar with the project structure.
  
  By following these steps, you should be able to resolve the error and ensure that your project assignments are correctly configured.