How To Fix 1B021 - The new posting date must be after the current valid posting date

1B021 - Overview

• Message type: E = Error

• Message class: 1B - BKK: General Texts

• Message number: 021

• Message text: The new posting date must be after the current valid posting date

What causes this issue?

You have specified a posting date that is on or before the current
posting date. The earliest posting date that you can specify is one
working day after the current posting 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?

You can change the message type to a warning by making an entry in
Customizing for <ZK>Bank Customer Accounts (IS-B-BCA) </>by choosing
<LS>Tools -> <DS:SIMG.BCA_V_T100C>Change Message Control</></>. The
system then allows you to ignore the warning and proceed with the
account closure process.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

1B021 - Details

• The SAP error message 1B021 indicates that the new posting date you are trying to enter is not valid because it must be after the current valid posting date. This error typically occurs in the context of financial postings, where the system enforces rules regarding the posting periods to ensure data integrity and compliance with accounting standards.
  
  Cause:
  
  Posting Period Control: The error usually arises when the posting date you are trying to use falls within a closed posting period. SAP has a configuration that restricts postings to certain periods to prevent changes to historical data.
  Date Configuration: The current valid posting date is determined by the configuration in the financial accounting module, which includes settings for open and closed periods.
  User Authorization: Sometimes, the user may not have the necessary authorization to post in a certain period, leading to this error.
  
  
  Solution:
  
  
  Check Posting Periods:
  
  Go to the transaction code OB52 (or use the menu path: