How To Fix 8A128 - Date error: Document date &1 inconsistent with last-assigned date &2

SAP Error Message - Details

• Message type: E = Error

• Message class: 8A - Messages for Argentina

• Message number: 128

• Message text: Date error: Document date &1 inconsistent with last-assigned date &2

What causes this issue?

The date that was entered for the document is earlier than the last
assigned date of the official document number.
To generate an official document number with date control, enter a
document date that is later than the last assigned date of the official
document number.

System Response

The system will not allow you to post this document.

How to fix this error?

Ensure that the date in the document is filled correctly.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 8A128 - Date error: Document date &1 inconsistent with last-assigned date &2 ?

  The SAP error message 8A128 indicates a date inconsistency issue in the system. Specifically, it means that the document date you are trying to enter is inconsistent with the last-assigned date for the relevant document type or transaction. This can occur in various SAP modules, such as Financial Accounting (FI) or Controlling (CO), where date integrity is crucial for accurate reporting and processing.
  Cause:
  
  Document Date vs. Last Assigned Date: The document date you are trying to enter is earlier or later than the last assigned date for that document type. This can happen if there are restrictions on the posting periods or if the document date falls outside the allowed range.
  Posting Periods: The posting period may be closed, or the document date may not fall within the open posting periods defined in the system.
  Configuration Settings: There may be specific configuration settings in the document type or company code that restrict the dates that can be used for posting.
  
  Solution:
  
  Check Document Date: Ensure that the document date you are entering is correct and falls within the allowed posting periods. If necessary, adjust the document date to a valid date.
  Review Posting Periods: Go to the transaction code OB52 to check the posting periods for the relevant company code and ensure that the document date falls within an open period.
  Adjust Configuration: If the issue persists, review the configuration settings for the document type in transaction code OBA7 or similar, depending on the specific module you are working with. Ensure that the settings allow for the document date you are trying to use.
  Consult with SAP Basis or Functional Team: If you are unable to resolve the issue, it may be necessary to consult with your SAP Basis or functional team to investigate further, especially if there are custom configurations or enhancements in place.
  
  Related Information:
  
  Transaction Codes: 
  
  OB52: To check and manage posting periods.
  OBA7: To review and adjust document type settings.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Review SAP documentation related to document posting and date management for further insights into how dates are handled in your specific SAP environment.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.