Message type: E = Error
Message class:  UKM_DCD_MSG - Messages for the Documented Credit Decision 
Message number: 040
Message text: Document &1 has not been rejected
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 UKM_DCD_MSG040 indicates that a document (identified by the placeholder &1) has not been rejected in the context of the SAP system's credit management or risk management processes. This message typically arises in the context of the SAP Credit Management module, which is part of the SAP ERP system.
Cause: The error message can occur due to several reasons, including: Document Status: The document may not be in a status that allows it to be rejected. For example, it might already be processed or in a state that does not permit rejection. Authorization Issues: The user may not have the necessary authorizations to reject the document. Business Rules: There may be specific business rules or configurations that prevent the rejection of the document. Incomplete Data: The document may have missing or incomplete data that prevents it from being processed correctly.
Solution: To resolve the issue, you can take the following steps: Check Document Status: Verify the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
UKM_DCD_MSG039 Document &1 has been rejected
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
UKM_DCD_MSG038 The required approvals for release are not available
What causes this issue?  You would like to release a document that is blocked for credit reasons. However, due to the open credit value two additional...
UKM_DCD_MSG041 Rejection is not possible for an entry with this status
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
UKM_DCD_MSG042 Rejection not possible; entry does not relate to an SD document
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.