Message type: E = Error
Message class:  FINS_MIG_HBA - Migration Cockpit 
Message number: 028
Message text: Blocking of G/L Account &1 is not permitted.
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.
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.
The SAP error message FINS_MIG_HBA028 indicates that the blocking of a General Ledger (G/L) account is not permitted. This error typically arises during the migration or data upload processes when there is an attempt to block a G/L account that is either already in use or has certain restrictions preventing it from being blocked. Causes: Account Usage: The G/L account may be actively used in transactions, making it impossible to block. Account Type: Certain types of G/L accounts (like reconciliation accounts) may have restrictions on blocking. Configuration Settings: The system configuration may not allow blocking of specific accounts based on business rules or settings. Open Periods: If there are open periods in the accounting, blocking may not be allowed. Authorization Issues: The user may not have the necessary authorizations to block the account. Solutions: Check Account Status: Verify if the G/L account is currently in use. If it has open transactions, you may need to clear those before
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FINS_MIG_HBA027 Posting with Document Type &1 is not permitted.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FINS_MIG_HBA026 Posting on Ledger &1 is not permitted.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FINS_MIG_HBA029 Reverse of Account &1 started.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FINS_MIG_HBA030 Transfer of Account &1 started (in Test Mode).
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.