How To Fix MD108 - Finish date lies before the start date

SAP Error Message - Details

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 108

• Message text: Finish date lies before the start date

What causes this issue?

The end date of the validity period lies before the start date.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD108 - Finish date lies before the start date ?

  The SAP error message MD108, which states "Finish date lies before the start date," typically occurs in the context of production planning or scheduling within the SAP system. This error indicates that there is a discrepancy in the dates defined for a particular operation or task, where the finish date is set to an earlier time than the start date, which is logically incorrect.
  Cause:
  
  Incorrect Date Entry: The most common cause is manual entry errors where the finish date is mistakenly entered before the start date.
  Data Migration Issues: If data has been migrated from another system, there may be inconsistencies in date formats or values.
  Scheduling Conflicts: If there are overlapping operations or tasks that have been scheduled incorrectly, it can lead to this error.
  Master Data Issues: Problems with the master data, such as incorrect lead times or production versions, can also lead to this error.
  
  Solution:
  
  Check Date Entries: Review the start and finish dates for the relevant operation or task. Ensure that the finish date is set to a time that is after the start date.
  Adjust Scheduling: If the dates are part of a scheduling process, adjust the scheduling parameters to ensure that the finish date logically follows the start date.
  Review Master Data: Check the master data related to the production order, including routing and work center data, to ensure that all relevant dates and lead times are correctly defined.
  Recreate the Task: If the error persists, consider deleting and recreating the task or operation with the correct dates.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to the version of SAP you are using.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CO01 (Create Production Order), CO02 (Change Production Order), or MD04 (Stock/Requirements List) to access and modify the relevant data.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorization: Ensure that you have the necessary permissions to make changes to production orders or scheduling data.
  Testing: After making changes, test the process to ensure that the error does not reoccur.
  
  By following these steps, you should be able to resolve the MD108 error and ensure that your scheduling and production planning processes run smoothly.