Message type: E = Error
Message class:  SEEF_BADI - Messages on BAdIs 
Message number: 003
Message text: BAdI &1 does not exist
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 SEEF_BADI003 indicates that a Business Add-In (BAdI) specified in your code or configuration does not exist in the system. This can occur for several reasons, and here are some common causes, solutions, and related information: Causes: Typographical Error: The name of the BAdI might be misspelled in the code or configuration. BAdI Not Activated: The BAdI may not be activated in the system. Missing Implementation: There may be no implementation for the specified BAdI in the system. Incorrect Namespace: The BAdI might be in a different namespace that is not accessible in your current context. Version Issues: The BAdI may exist in a different version of the SAP system or module that you are using. Solutions: Check Spelling: Verify that the BAdI name is spelled correctly in your code or configuration. Activate the BAdI: Go to transaction SE18 (BAdI Definition) and check if the BAdI is defined and activated. If it is not activated, you
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SEEF_BADI002 Fill out all required fields
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SEEF_BADI001 Enhancement spot is not empty
What causes this issue?  Enhancement spot is not empty.System Response  The enhancement spot cannot be deleted as it still contains references to ENHA...
SEEF_BADI004 A screen enhancement with the key &1 &2 &3 already exists
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SEEF_BADI005 A screen enhancement for BAdI &1 already exists
What causes this issue?  Screen or function code enhancements exist for BAdI &V1&. The flag 'multiple use' cannot be set as a result...
Click on this link to search all SAP messages.