How To Fix BK042 - Unit of measure & cannot be converted to &

SAP Error Message - Details

• Message type: E = Error

• Message class: BK - Create, Display, Reverse Controlling Document

• Message number: 042

• Message text: Unit of measure & cannot be converted to &

What causes this issue?

You entered a unit of measure which is not normally used to record the
consumption, activity, or output in the cost center or order. This unit
of measure is &V2&, not &V1&.
You can enter the quantity in another unit of measure, but this must be
convertible to &V2&. The given unit of measure &V1& cannot be converted
to &V2&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Do not enter a unit of measure. The system will then automatically
default to &V2&.
Alternatively, enter a unit of measure which can be converted to &V2&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BK042 - Unit of measure & cannot be converted to & ?

  The SAP error message BK042, which states "Unit of measure & cannot be converted to &," typically occurs when there is an issue with the conversion of units of measure in financial transactions or postings. This error can arise in various contexts, such as during the posting of invoices, goods movements, or when working with materials that have different units of measure.
  Cause:
  
  Incompatible Units of Measure: The primary cause of this error is that the system is unable to convert one unit of measure to another due to a lack of defined conversion factors between the two units.
  Missing Conversion Factors: If the conversion factors between the units of measure are not maintained in the system, SAP will not be able to perform the necessary conversions.
  Incorrect Configuration: There may be configuration issues in the material master or in the settings for the specific transaction being processed.
  Data Entry Errors: Sometimes, the error can be triggered by incorrect data entry, such as entering a unit of measure that is not valid for the material or transaction.
  
  Solution:
  
  
  Check Unit of Measure Settings:
  
  Go to the material master record (transaction code MM03) and check the units of measure defined for the material. Ensure that the base unit of measure and any alternative units of measure are correctly set up.
  Verify that the conversion factors between the units of measure are maintained in the material master.
  
  
  
  Maintain Conversion Factors:
  
  If conversion factors are missing, you can maintain them in the material master under the "Units of Measure" tab. Ensure that the conversion factors are correctly defined for the units involved.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the SAP system related to units of measure. This can be done in the SPRO transaction under "Logistics - General" > "Unit of Measure" to ensure that the necessary settings are in place.
  
  
  
  Data Entry Validation:
  
  Ensure that the data being entered in the transaction is valid. Double-check the units of measure being used and ensure they are appropriate for the material or transaction.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional guidance on handling unit of measure issues.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  MM03 (Display Material), MM02 (Change Material), and MM01 (Create Material) for checking and maintaining material master data.
  MB1A, MIGO, or FB60 for posting goods movements or invoices where the error might occur.
  
  
  
  SAP Notes: 
  
  Check SAP Notes for any known issues or patches related to unit of measure conversions.
  
  
  
  User Exits and BAdIs: 
  
  If custom logic is involved, check for any user exits or BAdIs that might affect unit of measure handling.
  
  
  
  By following these steps, you should be able to identify and resolve the cause of the BK042 error in SAP.