How To Fix MH329 - Excess Length When Converting Purchase Order Price Units Into Order Units

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 329

• Message text: Excess Length When Converting Purchase Order Price Units Into Order Units

What causes this issue?

You have entered an order unit and a purchase order price unit. Based
on this data, the system internally calculates the conversion factors
between the two units. The nominator or the denominator is greater than
99999.

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?

Change the order unit and/or the purchase order price unit.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MH329 - Excess Length When Converting Purchase Order Price Units Into Order Units ?

  The SAP error message MH329, which states "Excess Length When Converting Purchase Order Price Units Into Order Units," typically occurs when there is a mismatch in the unit of measure (UoM) or when the conversion between different units of measure exceeds the allowed length or precision defined in the system.
  Cause:
  
  
  Unit of Measure Configuration: The error often arises due to incorrect configuration of the units of measure in the material master or purchase order. If the conversion factor between the purchase order price unit and the order unit is not set up correctly, it can lead to this error.
  
  
  Decimal Places: The number of decimal places defined for the units of measure may not be sufficient to handle the conversion, leading to an overflow or excess length error.
  
  
  Data Entry Errors: Incorrect data entry in the purchase order, such as entering a price or quantity that exceeds the defined limits for the unit of measure.
  
  
  Solution:
  
  
  Check Unit of Measure Settings:
  
  Go to the material master (transaction code MM03) and check the unit of measure settings for the relevant material. Ensure that the purchase order unit and order unit are correctly defined and that the conversion factors are accurate.
  
  
  
  Adjust Decimal Places:
  
  Review the decimal places defined for the units of measure in the configuration settings (transaction code OME1 for unit of measure settings). If necessary, increase the number of decimal places to accommodate the conversion.
  
  
  
  Review Purchase Order Data:
  
  Check the purchase order for any incorrect entries. Ensure that the quantities and prices are entered correctly and that they conform to the defined units of measure.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific details on unit of measure conversions and any limitations that may apply.
  
  
  
  Testing:
  
  After making adjustments, create a test purchase order to verify that the error has been resolved.
  
  
  
  Related Information:
  
  
  Unit of Measure (UoM): In SAP, UoM is critical for inventory management and purchasing. Each material can have multiple units of measure, and proper configuration is essential for accurate transactions.
  
  
  Material Master: The material master record contains all the information related to a material, including its units of measure and conversion factors.
  
  
  Transaction Codes:
  
  MM03: Display Material Master
  OME1: Maintain Units of Measure
  ME21N: Create Purchase Order
  
  
  
  If the issue persists after following these steps, it may be necessary to consult with your SAP support team or a functional consultant who specializes in materials management for further assistance.