Message type: E = Error
Message class:  FKK_ID_XX_ODN - ODN message 
Message number: 044
Message text: Format of the official doc. number should not start with charcter "*"
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 FKK_ID_XX_ODN044 indicates that there is an issue with the format of the official document number in the context of the SAP Convergent Charging or Contract Accounts Receivable and Payable (FI-CA) module. Specifically, the error states that the official document number should not start with the character "*".
Cause: The error is triggered when a user attempts to enter or process an official document number that begins with the asterisk (*) character. In SAP, certain characters may be reserved or have specific meanings, and starting a document number with an asterisk is not allowed in this context.
Solution: To resolve this error, follow these steps: Check the Document Number: Review the official document number you are trying to enter. Ensure that it does not start with the asterisk (*) character. Modify the Document Number: If the document number currently starts with an asterisk, modify it to start with a valid character (e.g., a
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FKK_ID_XX_ODN043 Official document number truncated
What causes this issue?  The generated official document number containing prefixes and/or sufixes exceeded the maximum permitted length for official ...
FKK_ID_XX_ODN042 &1 is not a valid reserved placeholder
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FKK_ID_XX_ODN045 Number range assignment missing for document class &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FKK_ID_XX_ODN046 Use doc.class(receiv./ cdt. memo) with rule or ext.official 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.