Message type: E = Error
Message class:  67_LOAN - Messages for Fin. Asset Management for Loans - Continued 
Message number: 439
Message text: No reason for reversal
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 67_LOAN439: No reason for reversal typically occurs in the context of loan management or financial transactions within the SAP system. This error indicates that a reversal transaction is being attempted without a specified reason, which is required for the reversal process to be valid.
Cause: Missing Reason Code: The most common cause of this error is that the user has not provided a reason code for the reversal transaction. In many financial systems, a reason code is necessary to document why a transaction is being reversed.
Configuration Issues: There may be configuration settings in the SAP system that require a reason for reversals, and these settings may not be properly defined or maintained. User Input Error: The user may have overlooked entering the required information in the transaction screen.
Solution: Enter a Reason Code: When attempting to reverse a transaction, ensure that you provide a valid reason code in the designated field.
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
67_LOAN438 Posting not possible
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
67_LOAN437 Financial accounting objects could not be locked
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
67_LOAN440 Error when preparing posting
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
67_LOAN441 Error when completing posting
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.