How To Fix WH044 - More than one SAP unit of measurement exists for ISO code &

SAP Error Message - Details

• Message type: E = Error

• Message class: WH - Messages for store physical inventory (DRS)

• Message number: 044

• Message text: More than one SAP unit of measurement exists for ISO code &

What causes this issue?

For this ISO code for units of measurement there are several SAP
units of measurement in the system.

System Response

The system cannot determine the corresponding SAP unit of
measurement and cannot update this intermediate document item.

How to fix this error?

Maintain the units of measurement with the corresponding ISO
code in Customizing under <DS:SIMG.SIMG_CFMENUOLMSOMSC>check
units of measurement</>.
Please ensure that only one AP unit of measurement is assigned to each
ISO code and let the system update the intermediate document again
afterwards.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WH044 - More than one SAP unit of measurement exists for ISO code & ?

  Certainly! Here's a detailed explanation for the SAP error message WH044: More than one SAP unit of measurement exists for ISO code &:
  
  Error Message
  WH044: More than one SAP unit of measurement exists for ISO code &
  
  The & is a placeholder for the ISO unit of measurement code.
  
  
  Cause
  This error occurs when SAP finds more than one internal SAP unit of measurement (UoM) assigned to the same ISO unit of measurement code in the system. 
  
  SAP uses ISO codes as a standard reference for units of measurement.
  However, internally, SAP allows multiple units of measurement that can share the same ISO code.
  When a process (e.g., goods movement, delivery, or inventory management) tries to determine the SAP unit of measurement based on the ISO code, SAP cannot decide which one to use because multiple units are linked to the same ISO code.
  This ambiguity causes the system to throw the WH044 error.
  
  
  When does it typically occur?
  
  During goods receipt or goods issue postings.
  When converting or interpreting units of measurement in inventory management.
  When integrating with external systems or interfaces that use ISO codes.
  When customizing or maintaining units of measurement in SAP.
  
  
  Solution
  
  
  Identify the conflicting units of measurement:
  
  Use transaction CUNI (Units of Measurement) to display all units of measurement.
  Filter or search by the ISO code mentioned in the error message.
  You will find multiple SAP units linked to the same ISO code.
  
  
  
  Analyze the units:
  
  Determine which unit(s) are redundant or incorrectly assigned.
  Check if the units are used in master data, material master, or other configurations.
  
  
  
  Resolve the conflict:
  
  Option A: If one of the units is not used or obsolete, consider deleting or deactivating it.
  Option B: If both units are required, you may need to adjust the process or master data to specify the exact SAP unit of measurement instead of relying on the ISO code.
  Option C: Adjust the ISO code assignment so that each SAP unit of measurement has a unique ISO code.
  
  
  
  Check material master data:
  
  Ensure that the material master (transaction MM03) uses the correct SAP unit of measurement.
  Avoid ambiguous or multiple units with the same ISO code for the same material.
  
  
  
  Test the process again:
  
  After corrections, repeat the transaction that caused the error to confirm the issue is resolved.
  
  
  
  
  Related Information
  
  Transaction CUNI: Maintain and display units of measurement.
  Material Master (MM03/MM02): Check units of measurement assigned to materials.
  ISO Codes: International standard codes for units of measurement (e.g., KG for kilogram, M for meter).
  SAP Note / Documentation: Check SAP OSS notes or help portal for any updates or patches related to WH044.
  Customization Path: SPRO ? Logistics General ? Units of Measurement ? Define Units of Measurement.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Multiple SAP units of measurement assigned to the same ISO code, causing ambiguity.
  
  
  Effect
  SAP cannot determine which unit to use, resulting in error WH044.
  
  
  Solution
  Identify conflicting units in CUNI, remove or adjust assignments, ensure unique ISO codes.
  
  
  Transactions
  CUNI (Units of Measurement), MM03/MM02 (Material Master)
  
  
  Notes
  Review SAP Notes and documentation for updates.
  
  
  
  
  If you need help with specific steps or screenshots, feel free to ask!