How To Fix WU128 - Planned sales volume cannot be less than 0

SAP Error Message - Details

• Message type: E = Error

• Message class: WU - Promotion management messages

• Message number: 128

• Message text: Planned sales volume cannot be less than 0

What causes this issue?

A negative value was entered when planning the total sales volume
of the promotion. You cannot have negative sales volumes.

How to fix this error?

Enter the correct value.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WU128 - Planned sales volume cannot be less than 0 ?

  The SAP error message WU128, which states "Planned sales volume cannot be less than 0," typically occurs in the context of sales and operations planning or when dealing with sales forecasts in SAP. This error indicates that there is an attempt to enter a planned sales volume that is negative, which is not permissible in the system.
  Cause:
  
  Negative Input: The most common cause is that a user has inadvertently entered a negative value for planned sales volume in a planning transaction or report.
  Data Transfer Issues: If data is being transferred from another system or module, there may be an issue with the data mapping or transformation that results in negative values being sent to the sales planning module.
  Incorrect Configuration: There may be configuration settings in the planning module that do not allow for negative values, which could be due to business rules or settings in the planning strategy.
  
  Solution:
  
  Check Input Values: Review the input values for the planned sales volume. Ensure that all entries are zero or positive. Correct any negative values before saving or processing the data.
  Data Validation: Implement data validation checks in the input forms or reports to prevent users from entering negative values.
  Review Data Transfer Processes: If the data is being imported or transferred from another system, check the data mapping and transformation logic to ensure that negative values are not being introduced.
  Consult Configuration Settings: Review the configuration settings in the SAP system related to sales planning. Ensure that the settings align with business requirements and do not inadvertently allow for negative values.
  User Training: Provide training to users on how to correctly enter planned sales volumes and the implications of negative values.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be using transaction codes like MD61 (Create Planning) or MD62 (Change Planning) when encountering this error.
  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 problems.
  Documentation: Refer to SAP documentation on sales and operations planning for best practices and guidelines on entering planned sales volumes.
  
  By addressing the root cause of the error and implementing preventive measures, you can avoid encountering the WU128 error in the future.