How To Fix FB791 - Invalid +/- sign & for sales

SAP Error Message - Details

• Message type: E = Error

• Message class: FB - Batch Programs

• Message number: 791

• Message text: Invalid +/- sign & for sales

Self-Explanatory Message

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FB791 - Invalid +/- sign & for sales ?

  The SAP error message FB791, which states "Invalid +/- sign," typically occurs during the posting of financial documents in the SAP system. This error is often related to the way amounts are entered in the system, particularly when dealing with debits and credits.
  Cause:
  
  Incorrect Sign Usage: The error usually arises when the user enters an amount with an incorrect sign. For example, if a debit amount is expected but a credit amount is entered (or vice versa), the system will throw this error.
  Configuration Issues: There may be issues with the configuration of the account types or the settings in the financial document types.
  Data Entry Errors: Manual entry errors can lead to incorrect signs being used, especially if users are not familiar with the expected input format.
  Currency Issues: If the document involves multiple currencies, the sign might be affected by the currency conversion settings.
  
  Solution:
  
  Check Amounts: Review the amounts being entered in the transaction. Ensure that the signs are correct according to the type of transaction (debit or credit).
  Review Document Type: Ensure that the document type being used is appropriate for the transaction. Different document types may have different rules regarding signs.
  Configuration Review: If the issue persists, consult with your SAP configuration team to review the settings for the relevant accounts and document types.
  User Training: Provide training to users on how to correctly enter amounts in SAP, emphasizing the importance of using the correct signs.
  Test Transactions: If you suspect a configuration issue, try posting a test transaction with known values to see if the error persists.
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes related to financial postings, such as FB01 (Post Document), FB50 (G/L Account Document), or others.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its system, and there may be specific notes addressing this error.
  Documentation: Refer to SAP documentation for guidelines on posting financial documents, which may provide insights into common pitfalls and best practices.
  
  If the problem continues after following these steps, it may be beneficial to engage with SAP support or your internal IT team for further investigation.