How To Fix 9J878 - Quantity in stock is not equal to 1

SAP Error Message - Details

• Message type: E = Error

• Message class: 9J -

• Message number: 878

• Message text: Quantity in stock is not equal to 1

What causes this issue?

You want to change the equipment from being a multi-part equipment to
being an equipment item.
You can only do this if a quantity of 1 has been used in inventory
management up until now.
However, stock entries with values other than one have been entered.
This means that you cannot change this equipment into an equipment
item.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 9J878 - Quantity in stock is not equal to 1 ?

  The SAP error message 9J878, which states "Quantity in stock is not equal to 1," typically occurs in scenarios involving inventory management, particularly when dealing with stock items that are expected to have a specific quantity on hand. This error can arise in various contexts, such as during goods movements, stock transfers, or when performing inventory counts.
  Cause:
  
  Stock Quantity Mismatch: The most common cause of this error is that the system expects a specific quantity (usually 1) for a particular stock item, but the actual quantity in stock is different (either 0 or more than 1).
  Incorrect Stock Configuration: The item may be configured in a way that it should only have a single unit in stock, such as serialized items or items managed in batches.
  Inventory Management Issues: There may be discrepancies in the inventory records due to previous transactions that were not properly recorded or completed.
  User Error: The user may be attempting to perform an operation that is not valid for the current stock situation, such as trying to issue or transfer an item that is not available in the expected quantity.
  
  Solution:
  
  Check Stock Levels: Verify the current stock levels of the item in question using transaction codes like MMBE (Stock Overview) or MB52 (List Warehouse Stocks on Hand). Ensure that the stock quantity matches the expected quantity.
  Adjust Inventory: If there is a discrepancy, you may need to perform a stock adjustment using transaction MI01 (Create Physical Inventory Document) or MIGO (Goods Movement) to correct the stock levels.
  Review Item Configuration: Check the material master data to ensure that the item is configured correctly, especially if it is a serialized or batch-managed item.
  Consult with Inventory Management: If the issue persists, consult with your inventory management team to investigate any underlying issues with stock management processes or system configurations.
  Reprocess Transactions: If the error occurred during a specific transaction, consider reversing or reprocessing that transaction to ensure it is completed correctly.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MMBE, MIGO, MI01, and MB52 for managing and reviewing stock.
  Material Master Data: Review the material master data for the item to understand its stock management settings.
  SAP Notes: Check SAP Notes and documentation for any known issues or updates related to this error message.
  User Training: Ensure that users are trained on proper inventory management practices to minimize errors related to stock quantities.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.