How To Fix MW858 - Error occurred during quantity calculation

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 858

• Message text: Error occurred during quantity calculation

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MW858 - Error occurred during quantity calculation ?

  The SAP error message MW858 ("Error occurred during quantity calculation") typically occurs in the context of inventory management or material movements, particularly when there is an issue with the quantity calculations for stock items. This error can arise in various scenarios, such as during goods movements, stock transfers, or inventory adjustments.
  Causes of MW858 Error
  
  
  Data Inconsistencies: There may be inconsistencies in the material master data, such as incorrect unit of measure settings or missing data.
  
  
  Stock Levels: The system may be trying to calculate quantities for materials that do not have sufficient stock levels or are not properly defined in the system.
  
  
  Configuration Issues: Incorrect configuration in the inventory management settings or material valuation settings can lead to calculation errors.
  
  
  Batch Management: If batch management is enabled, issues with batch data or batch determination can cause this error.
  
  
  User Input Errors: Incorrect entries during transactions, such as entering negative quantities or invalid material numbers.
  
  
  System Bugs: Occasionally, software bugs or issues in the SAP system can lead to unexpected errors.
  
  
  Solutions to MW858 Error
  
  
  Check Material Master Data: Verify that the material master data is complete and correct. Ensure that the unit of measure, valuation class, and other relevant fields are properly configured.
  
  
  Review Stock Levels: Check the stock levels for the material in question. Ensure that there is sufficient stock available for the transaction being performed.
  
  
  Transaction Data: Review the transaction data for any inconsistencies or errors. Ensure that all required fields are filled out correctly.
  
  
  Configuration Review: If you have access, review the configuration settings in the inventory management module to ensure they are set up correctly.
  
  
  Batch Data: If batch management is used, check the batch data for any issues. Ensure that the batches are correctly defined and available for the transaction.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that may address known issues related to this error.
  
  
  Debugging: If you have access to debugging tools, you can analyze the program logic to identify where the error is occurring.
  
  
  Contact Support: If the issue persists and you cannot resolve it, consider reaching out to your SAP support team or SAP directly for assistance.
  
  
  Related Information
  
  Transaction Codes: Common transaction codes related to inventory management include MIGO (Goods Movement), MB1A (Goods Withdrawal), and MB1B (Transfer Posting).
  SAP Documentation: Refer to SAP Help documentation for detailed information on inventory management and material movements.
  User Forums: Online forums and communities, such as SAP Community, can provide insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the MW858 error in SAP.