How To Fix VSB406 - Quantity and value of the item must have the same +/- sign

SAP Error Message - Details

• Message type: E = Error

• Message class: VSB - Self-Billing Procedure Messages

• Message number: 406

• Message text: Quantity and value of the item must have the same +/- sign

What causes this issue?

The IDoc item has different plus/minus signs for the quantity and value
displayed.
Quantity:,,&V1&
Value:,,&V2&
An IDoc that does not identify a unique plus/minus sign at item level,
is not processed further.

System Response

The verification check ends with this message. Changes can no longer be
executed online as this is an example of quantity and value fields.

How to fix this error?

Ensure that quantities and values of an item always have the same
plus/minus sign in the EDI subsystem (converter).
These are primarily examples of IDoc fields.
E1EDP01-MENGE (item quantity) and
E1EDP26-BETRG (net value of item).
For other value or amount fields, such as conditions or taxes, the plus
/minus sign should also be adjusted. These fields are not used directly
in the processing step, however they are used in the monitor for
display.
Item quantity and item net value are used directly in processing with
the plus/minus sign provided by the EDI subsystem (converter).

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VSB406 - Quantity and value of the item must have the same +/- sign ?

  The SAP error message VSB406 indicates that there is a mismatch between the sign of the quantity and the value of an item in a transaction. This typically occurs in scenarios involving inventory management, sales orders, or billing documents where the system expects the quantity and value to either both be positive or both be negative.
  Cause:
  
  Mismatched Signs: The most common cause of this error is that the quantity of an item is positive while the value (price) is negative, or vice versa. For example, if you are trying to return an item, the quantity might be negative, but the value is still positive.
  Incorrect Configuration: Sometimes, the configuration settings in the system for certain transactions may not align with the expected behavior, leading to this error.
  Data Entry Errors: Manual entry errors during the creation of documents can also lead to this issue, such as entering a negative quantity or value incorrectly.
  
  Solution:
  
  Check Quantity and Value: Review the document or transaction where the error occurred. Ensure that the signs of the quantity and value match. If the quantity is negative (indicating a return), the value should also be negative.
  Adjust the Document: If you find a mismatch, correct the quantity or value as necessary. For example, if the quantity is positive, ensure that the value is also positive.
  Review Configuration: If this error occurs frequently, it may be worth reviewing the configuration settings in SAP related to the specific transaction type to ensure they are set up correctly.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on handling quantities and values in the context of your business processes.
  User Training: If data entry errors are common, consider providing additional training to users on how to correctly enter quantities and values in SAP.
  
  Related Information:
  
  Transaction Types: This error can occur in various transaction types, including sales orders, purchase orders, and inventory adjustments.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, there may be specific fixes or updates provided by SAP.
  Debugging: If you have access to technical resources, debugging the transaction can help identify where the mismatch is occurring in the code or configuration.
  
  By following these steps, you should be able to resolve the VSB406 error and ensure that the quantity and value of items in your SAP transactions are consistent.