How To Fix WG318 - Net PO weight could not be correctly determined for purchase order &

SAP Error Message - Details

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 318

• Message text: Net PO weight could not be correctly determined for purchase order &

What causes this issue?

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

System Response

How to fix this error?

Maintain the material master data for materials in the purchase order
concerned.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WG318 - Net PO weight could not be correctly determined for purchase order & ?

  Certainly! Here's detailed information about the SAP error message WG318 - Net PO weight could not be correctly determined for purchase order &:
  
  Error Message
  WG318: Net PO weight could not be correctly determined for purchase order &
  
  Cause
  This error occurs when SAP is unable to calculate or determine the net weight of the purchase order (PO) because the system lacks the necessary weight data for the materials included in the PO. The net weight is typically calculated based on the material master data, specifically the Gross Weight and Tare Weight or Net Weight fields.
  Common causes include:
  
  The material master record does not have weight data maintained (Gross Weight, Net Weight, or Unit of Measure for weight).
  The unit of measure for weight is missing or inconsistent.
  The PO contains materials for which weight data is incomplete or missing.
  Customizing or configuration issues related to weight determination in the purchasing or logistics module.
  The system is unable to convert the weight units properly due to missing or incorrect unit of measure conversion factors.
  
  
  Solution
  To resolve the WG318 error, follow these steps:
  
  
  Check Material Master Data:
  
  Go to transaction MM03 (Display Material).
  Check the Basic Data 1 view for the material(s) in the PO.
  Verify that the Gross Weight and Net Weight fields are maintained.
  Ensure the Weight Unit (e.g., KG, LB) is correctly specified.
  
  
  
  Maintain Missing Weight Data:
  
  If weight data is missing, maintain it in the material master using transaction MM02 (Change Material).
  Enter the correct gross/net weight and weight unit.
  
  
  
  Verify Unit of Measure (UoM) Settings:
  
  Check the unit of measure settings in transaction CUNI or OMWN.
  Ensure that the weight units used are consistent and that conversion factors are maintained if multiple units are involved.
  
  
  
  Check Purchase Order Items:
  
  Verify that all items in the PO have materials with valid weight data.
  If the PO contains non-stock or service items without weight, consider how the system should handle these.
  
  
  
  Review Customizing Settings:
  
  In SPRO, check the settings under Materials Management > Purchasing > Purchase Order > Define Weight Determination.
  Ensure that the system is configured to calculate net weight correctly.
  
  
  
  Recalculate or Update PO:
  
  After correcting the material master data, try to recreate or update the PO.
  The system should now be able to determine the net PO weight.
  
  
  
  
  Additional Information
  
  The net weight of a PO is important for logistics, shipping, and customs processes.
  This error typically appears during PO creation or change when the system tries to calculate the total weight.
  If the PO contains service items or non-material items, these may not have weight data, so the system might need to be configured to ignore or handle these cases.
  Sometimes, the error can be bypassed by customizing the system to not require weight determination for certain document types or item categories.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error Code
  WG318
  
  
  Message
  Net PO weight could not be correctly determined for purchase order &
  
  
  Cause
  Missing or incomplete weight data in material master or inconsistent UoM settings
  
  
  Solution
  Maintain gross/net weight and weight unit in material master; verify UoM and customizing
  
  
  Transaction
  MM03 (Display Material), MM02 (Change Material), CUNI/OMWN (UoM), SPRO (Customizing)
  
  
  
  
  If you need help with specific steps or transactions, feel free to ask!