Message type: E = Error
Message class:  SAAB - Messages for Activatable Assertions and Breakpoints 
Message number: 028
Message text: No authorization for changing a checkpoint group
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 SAAB028, which states "No authorization for changing a checkpoint group," typically occurs when a user attempts to modify a checkpoint group in the SAP system but lacks the necessary authorizations to perform that action. This error is related to the authorization objects that control access to specific functions within SAP.
Cause: The primary cause of this error is that the user does not have the required authorization to change the checkpoint group. This can happen due to: Missing Authorization Roles: The user’s role may not include the necessary permissions to modify checkpoint groups. Authorization Object Restrictions: The relevant authorization objects (such as S_TCODE, S_AUTHORITY, or others related to checkpoint management) may not be properly assigned to the user. Profile Issues: The user profile may not be updated or may not include the necessary authorizations.
Solution: To resolve the SAAB028 error, you can follow these steps: Check User Authorizations: Use transaction code SU53 immediately after encountering
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SAAB027 Activation for checkpoint group &1 was changed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SAAB026 Assignment to transaction &1 was deleted
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SAAB029 No authorization for displaying a checkpoint group
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SAAB030 No authorization for deleting a checkpoint group
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.