How To Fix PPH_FCDM021 - Negative Quantity not allowed: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: PPH_FCDM - Forecast Demand Messages

• Message number: 021

• Message text: Negative Quantity not allowed: &1

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 PPH_FCDM021 - Negative Quantity not allowed: &1 ?

  The SAP error message PPH_FCDM021, which states "Negative Quantity not allowed: &1," typically occurs in the context of production planning or inventory management within the SAP system. This error indicates that a negative quantity is being attempted in a situation where it is not permitted, such as during the processing of production orders, stock movements, or inventory adjustments.
  Cause:
  
  Negative Stock Movement: The system is trying to process a transaction that would result in a negative stock level, which is not allowed for certain materials or in specific configurations.
  Incorrect Configuration: The material master settings may not allow negative stock levels. This can be due to the settings in the material type or plant configuration.
  Data Entry Error: A user may have inadvertently entered a negative quantity in a transaction where only positive quantities are valid.
  Business Logic: The business process may not support negative quantities due to specific business rules or constraints.
  
  Solution:
  
  Check Material Master Settings: Review the material master data for the affected material. Ensure that the settings for negative stock are configured correctly. You can check the "Stock/Requirements List" and "General Plant Data/Storage" views.
  Review Transaction Data: Look at the transaction that triggered the error. Ensure that the quantities being entered are correct and that they do not lead to negative stock levels.
  Adjust Inventory: If the error is due to an attempt to adjust inventory, ensure that the adjustment does not result in negative stock. You may need to perform a stock transfer or a stock adjustment to correct the inventory levels.
  Consult with Business Process Owners: If the error persists, consult with the relevant business process owners or SAP functional consultants to understand if there are specific business rules that need to be adhered to.
  Debugging: If you have access to technical resources, debugging the transaction can help identify the exact point of failure and provide insights into why the negative quantity is being processed.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common errors.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Display Material), MB1A (Goods Withdrawal), and MB1B (Transfer Posting) to navigate and troubleshoot inventory issues.
  User Training: Ensure that users are trained on the correct procedures for entering quantities in SAP to minimize data entry errors that could lead to this message.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.