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

VSB406 - Overview

• 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