Message type: E = Error
Message class:  FKK_ID_XX_SAFT - SAFT message 
Message number: 012
Message text: Lower limit of Posting Date is greater than upper limit
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_SAFT012 indicates that there is an issue with the posting date range in a financial transaction, specifically that the lower limit of the posting date is greater than the upper limit. This typically occurs in the context of financial postings, such as in the SAP Convergent Charging or SAP Contract Accounts Receivable and Payable (FI-CA) modules.
Cause: Incorrect Date Range: The error arises when the system is trying to process a transaction with a posting date that falls outside the defined range. This can happen if: The lower limit date is set incorrectly (e.g., a future date). The upper limit date is set incorrectly (e.g., a past date). The configuration settings for the posting date range are not aligned with the actual transaction dates.
Configuration Issues: The configuration settings in the system for the posting date range may not be set correctly, leading to inconsistencies. Data Entry Errors: Manual entry errors when inputting
 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_SAFT011 End date must be the last day in the month
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_SAFT010 From date must be the first day in the month
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_SAFT013 Enter a value for Posting Date From
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_SAFT014 Extraction completed successfully
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.