Stop googling SAP errors. Use our Free Essentials plan instead - no credit card needed. Start Now

Close

How To Fix WS056 - Conversion factor replaced by one already defined


SAP Error Message - Details

  • Message type: E = Error

  • Message class: WS - Supplier Billing Document

  • Message number: 056

  • Message text: Conversion factor replaced by one already defined

  • Show details Hide details
  • What causes this issue?

    The conversion factor of the <GL:base_unit_of_measure>base unit of
    measure</> in the billing document unit which you entered does not agree
    with the conversion factor defined in the system.

    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?

    INCLUDE NA_EINGABE_PRUEFEN
    DEFINE &OBJEKTE& = 'Units of measure'
    INCLUDE NA_EINK_CUST

    <DS:SIMG.SIMG_CFMENUOLMSOMSC>Check units of measure</>
    ENDIF

    Error message extract from SAP system. Copyright SAP SE.


Smart SAP Assistant

  • What is the cause and solution for SAP error message WS056 - Conversion factor replaced by one already defined ?

    Certainly! Here's a detailed explanation for the SAP error message WS056: Conversion factor replaced by one already defined:


    Error Message

    WS056: Conversion factor replaced by one already defined


    Cause

    This error occurs in SAP when you try to define or maintain a unit of measure (UoM) conversion factor that conflicts with an existing conversion factor already defined for the same unit of measure pair.

    In other words, SAP already has a conversion factor defined between two units of measure, and you are attempting to enter a different conversion factor for the same unit pair. SAP does not allow multiple different conversion factors for the same unit pair because it would create ambiguity in quantity conversions.


    When does it occur?

    • When maintaining units of measure in transaction CUNI (Units of Measure).
    • When creating or changing material master data where unit conversions are involved.
    • When importing or updating units of measure via data migration or customization.
    • When defining alternative units of measure and their conversion factors.

    Explanation

    Units of measure in SAP are linked by conversion factors that define how to convert quantities from one unit to another (e.g., from KG to G, or from L to ML). Each pair of units can have only one conversion factor.

    If you try to enter a conversion factor for a unit pair that already exists, SAP will overwrite the existing factor and issue the warning WS056 to inform you that the previous factor is replaced.


    Solution

    1. Check existing conversion factors:

      • Use transaction CUNI to display the existing units of measure and their conversion factors.
      • Verify if the conversion factor you want to enter already exists.
    2. Decide if replacement is intended:

      • If you want to update the conversion factor, confirm that the new factor is correct and proceed.
      • If the existing factor is correct, do not overwrite it.
    3. Avoid duplicate entries:

      • Ensure you are not entering the same conversion factor multiple times.
      • If you need different conversions, consider defining additional units or alternative units rather than conflicting conversion factors.
    4. Check for data consistency:

      • If this error occurs during data migration or mass upload, verify the source data for conflicting conversion factors.
    5. Use SAP standard tools:

      • Use transaction CUNI for unit maintenance.
      • Use transaction MM02 to check material units and conversions.

    Additional Information

    • Transaction CUNI: Used to maintain units of measure and their conversion factors.
    • Unit of Measure Groups: Units are grouped logically; conversion factors are maintained within these groups.
    • Conversion Factor: Defines how many units of one UoM correspond to one unit of another UoM.
    • Impact: Incorrect conversion factors can lead to wrong quantity calculations in procurement, inventory, sales, and production.

    Summary

    Aspect Details
    Error WS056: Conversion factor replaced by one already defined
    Cause Attempt to define a conversion factor for a unit pair that already has a conversion factor
    Effect Existing conversion factor is overwritten; SAP issues warning WS056
    Solution Verify existing conversion factors in CUNI, confirm if replacement is intended, avoid duplicates
    Transactions CUNI (Units of Measure), MM02 (Material Master Change)

    If you need help with a specific scenario or transaction where this error occurs, please provide more details!

    • Do you have any question about this error?


      Upgrade now to chat with this error.


Instant HelpGet instant SAP help. Sign up for our Free Essentials Plan.


Related SAP Error Messages

Click the links below to see the following related messages:

Click on this link to search all SAP messages.


Rating
The AI Support Assistant is great. It provides comprehensive assistance even on the most difficult issues. I highly recommend this service.
Rate 1
John Jordan
SAP Consultant & Author