How To Fix IW128 - Start time interval may not be negative

SAP Error Message - Details

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 128

• Message text: Start time interval may not be negative

What causes this issue?

You maintained a value for the <GL:time_interval>time interval</> that
falls before the start date of the <GL:operation>operation</>. This is
not allowed.

System Response

INCLUDE 'KEINE-VERARBEITUNG' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

Enter a different time interval for the start of the operation.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IW128 - Start time interval may not be negative ?

  The SAP error message IW128, which states "Start time interval may not be negative," typically occurs in the context of work order management or maintenance planning within the SAP system. This error indicates that there is an issue with the time interval settings for a maintenance order or work order, specifically that the start time has been set to a negative value, which is not permissible.
  Cause:
  
  Incorrect Time Input: The most common cause is that the user has entered a negative value for the start time or the time interval in the relevant fields.
  System Configuration: There may be a configuration issue in the system that is causing the time values to be interpreted incorrectly.
  Data Entry Error: A simple typographical error during data entry can lead to this issue.
  Date/Time Format Issues: If the date and time formats are not correctly set or understood by the system, it may lead to negative time intervals.
  
  Solution:
  
  Check Input Values: Review the input values for the start time and ensure that they are positive and correctly formatted. Make sure that the time is entered in the correct format (e.g., HH:MM).
  Review Configuration: If the issue persists, check the configuration settings related to time intervals in the maintenance planning module. Ensure that all settings are correctly defined.
  Correct Data Entry: If the error is due to a data entry mistake, correct the values and try saving or processing the order again.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on the specific fields and their expected values.
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: This error may occur in transactions related to maintenance orders, such as IW31 (Create Order), IW32 (Change Order), or IW28 (Display Order).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Training: Ensure that users are trained on the correct procedures for entering time and date values in SAP to minimize the occurrence of such errors in the future.
  
  By following these steps, you should be able to identify and resolve the issue causing the IW128 error message in SAP.