Message type: E = Error
Message class:  FIN_FO_SSCUI - Messages for SSCUIs 
Message number: 001
Message text: The entered Bank (G/L) Account does not exist.
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 FIN_FO_SSCUI001 indicates that the system cannot find the specified Bank (G/L) Account in the system. This error typically occurs when you are trying to perform a financial transaction or access a financial report that requires a valid G/L account for a bank. Causes: Incorrect G/L Account Number: The G/L account number entered may be incorrect or mistyped. Account Not Created: The G/L account for the bank may not have been created in the system. Account Deactivated: The G/L account may exist but could be inactive or deactivated. Incorrect Company Code: The G/L account may not be assigned to the company code you are working with. Authorization Issues: The user may not have the necessary authorizations to access the G/L account. Solutions: Verify G/L Account Number: Double-check the G/L account number you entered for any typos or errors. Ensure that you are using the correct format for the G/L account number. Check Account Existence: Use transaction code FS00 to
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FIN_FO_SSCUI000 G/L Account mask must consist of 10 characters. Please add '+' as prefix.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIN_FO_PAYM_OUTPUT020 Variant &1 for report RFFOAVIS_FPAYM is not present
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIN_FO_SSCUI002 The entered Clearing Account (A/R) does not exist.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIN_FO_SSCUI003 You cannot use account masking only ('+').
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.