How To Fix CO098 - Conversion between unit of entry and base unit of measure not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CO - PPC order processing messages

• Message number: 098

• Message text: Conversion between unit of entry and base unit of measure not possible

What causes this issue?

The unit which you have entered cannot be converted into the base unit
of measure, since no conversion parameters have been entered in
Customizing.

How to fix this error?

Choose a different unit of measure, or define how the units are to be
converted in Customizing.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CO098 - Conversion between unit of entry and base unit of measure not possible ?

  The SAP error message CO098, which states "Conversion between unit of entry and base unit of measure not possible," typically occurs in the context of cost accounting or production planning when there is an issue with the unit of measure (UoM) conversion for a material or product. This error can arise in various scenarios, such as during the creation of production orders, cost estimates, or when performing inventory transactions.
  Causes of CO098 Error
  
  
  Missing Conversion Factors: The most common cause is that the conversion factors between the unit of entry (the unit you are trying to use) and the base unit of measure (the standard unit defined in the material master) are not defined in the material master record.
  
  
  Incorrect Unit of Measure Settings: The unit of measure settings in the material master may be incorrect or incomplete. This includes the base unit of measure and any alternative units of measure.
  
  
  Inactive or Incorrectly Defined Units: The unit of measure may be inactive or not properly defined in the system.
  
  
  Data Inconsistencies: There may be inconsistencies in the data related to the material, such as changes in the unit of measure that have not been properly updated across all relevant records.
  
  
  Solutions to CO098 Error
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03) and check the "Basic Data" and "Purchasing" views.
  Ensure that the base unit of measure is correctly defined and that conversion factors for any alternative units of measure are specified.
  
  
  
  Define Conversion Factors:
  
  If conversion factors are missing, you can define them in the material master. This can be done in the "Units of Measure" section of the material master record.
  
  
  
  Review Unit of Measure Settings:
  
  Ensure that the unit of measure you are trying to use is active and correctly defined in the system. You can check this in the "Units of Measure" configuration (transaction code CUNI).
  
  
  
  Check for Data Inconsistencies:
  
  Review any recent changes made to the material master or related records to ensure that all necessary updates have been made consistently.
  
  
  
  Consult Documentation:
  
  If you are unsure about the correct units of measure or conversion factors, consult the SAP documentation or your organization's SAP support team for guidance.
  
  
  
  Testing:
  
  After making changes, perform a test transaction to ensure that the error has been resolved.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  MM03: Display Material Master
  CUNI: Maintain Units of Measure
  CO01: Create Production Order
  CK11N: Create Cost Estimate
  
  
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  
  
  User Roles and Authorizations: Ensure that you have the necessary authorizations to make changes to the material master and unit of measure settings.
  
  
  By following these steps, you should be able to identify and resolve the CO098 error in SAP. If the issue persists, consider reaching out to your SAP support team for further assistance.