How To Fix M8636 - System calculates total qty and total amount from accnt assignment lines

SAP Error Message - Details

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 636

• Message text: System calculates total qty and total amount from accnt assignment lines

You have changed quantities or amounts in the account assignment lines.
In this case, the system calculates the values of the total quantity
and total amount from the values entered.
Note
It is possible that you have entered a total quantity that is different
from the calculated total of the quantities entered in the account
assignment items. The system overwrites the total quantity with the
values it has calculated from the account assignment lines. The
behavior is the same when determining the amounts.
You can customize this message. You can also switch the message off, as
required.

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message M8636 - System calculates total qty and total amount from accnt assignment lines ?

  The SAP error message M8636, which states "System calculates total qty and total amount from account assignment lines," typically occurs in the context of inventory management or material movements. This error indicates that there is a discrepancy between the total quantity and total amount calculated from the account assignment lines in a transaction.
  
  Cause:
  
  Data Entry Errors: Incorrect or inconsistent data entry in the account assignment lines can lead to mismatches in total quantities and amounts.
  
  Configuration Issues: Incorrect configuration in the material master or account assignment settings can cause discrepancies.
  Incomplete Transactions: If a transaction is not fully completed or if there are missing account assignment lines, it can lead to this error.
  Currency Conversion Issues: If there are different currencies involved and the conversion rates are not set correctly, it can lead to mismatches in amounts.
  Posting Period Issues: If the posting period is closed or not open for the transaction, it may lead