How To Fix WSTI_MM07I001 - The difference cannot be posted (calculate book inventory first)

WSTI_MM07I001 - Overview

• Message type: E = Error

• Message class: WSTI_MM07I - BAdI Implementation Messages MB_PHYSINV_INTERNAL

• Message number: 001

• Message text: The difference cannot be posted (calculate book inventory first)

What causes this issue?

The procedure for supporting physical inventory during opening times in
plant &V1& and storage location &V2& is activated. Therefore, the book
inventories for the counted items in a physical inventory document must
be calculated at count time before the physical inventory differences
for these items can be posted. However, no book inventories at count
time have been calculated for any of the items counted in physical
inventory document &V3&.

System Response

The system will not allow you to post the differences for document &V3&.

How to fix this error?

Execute the calculation of book inventories at count time. Then you can
post the physical inventory differences.

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.

WSTI_MM07I001 - Details

• SAP Error Message:
  WSTI_MM07I001 – The difference cannot be posted (calculate book inventory first)
  
  
  Cause:
  This error occurs during inventory posting or stock difference posting in SAP when the system detects that the book inventory (the system's recorded stock quantity) has not been calculated or updated before attempting to post the difference. Essentially, the system requires the book inventory to be calculated and up-to-date to correctly post any stock differences.
  This situation typically arises in scenarios such as:
  
  After a physical inventory count, before posting the differences.
  When the system's inventory data is out of sync or not updated.
  When the inventory calculation step (e.g., running the inventory difference calculation or stock reconciliation) has been skipped or not completed.
  
  
  Explanation:
  SAP requires the book inventory to be calculated to determine the correct stock levels before posting any differences. If the book inventory is not calculated, the system cannot determine the difference between the physical inventory and the book inventory,