Message type: E = Error
Message class:  FKK_ID_PT_SIGN - Digital Signature Portugal FI-CA/IS 
Message number: 515
Message text: Internal Code and Series must be defined.
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_PT_SIGN515 typically occurs in the context of contract accounts receivable and payable (FI-CA) when there is an issue with the configuration of internal codes and series for payment terms or other related settings. This error indicates that the system cannot find the necessary internal code or series that should be defined for the specific transaction or process you are trying to execute.
Cause: Missing Configuration: The internal code and series for payment terms or other relevant settings have not been defined in the system. Incorrect Settings: There may be incorrect or incomplete settings in the configuration of the contract accounts or payment terms. Data Inconsistency: There could be inconsistencies in the data that are causing the system to not recognize the required internal codes.
Solution: Check Configuration: Go to the configuration settings for contract accounts in the SAP system. Navigate to the relevant area where internal codes and series are defined (e.g., transaction code
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FKK_ID_PT_SIGN514 Internal Code and Series must be initial.
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_PT_SIGN513 Fiscal year is not identical with To Year. Fiscal year must be &1.
What causes this issue?  You have entered a <LS>Fiscal year</> that differs from the <LS>To yea </>r.System Response  The syst...
FKK_ID_PT_SIGN516 Cannot change the rule. &1/&2/&3/&4 is already in use.
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_PT_SIGN517 The rule for &1/&2/&3/&4 will be changed.
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.