How To Fix WRF_APC126 - Enter a distribution channel

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_APC - Messages for Operational Assortment Planning and Control

• Message number: 126

• Message text: Enter a distribution channel

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_APC126 - Enter a distribution channel ?

  SAP Error Message:
  
  WRF_APC126: Enter a distribution channel
  
  Cause:
  This error occurs because the system expects a distribution channel to be entered in a sales document or related transaction, but it has not been provided. The distribution channel is a key organizational unit in SAP Sales and Distribution (SD) that represents the way products or services reach the customer (e.g., wholesale, retail, direct sales).
  Typically, this error appears when:
  
  Creating or processing a sales order, quotation, or contract where the distribution channel is a mandatory field.
  The distribution channel is missing in the sales document header or item level.
  The configuration or master data setup requires a distribution channel but it is not maintained or passed correctly.
  
  
  Solution:
  
  
  Enter the Distribution Channel:
  
  When creating or editing the sales document, ensure that the Distribution Channel field is filled in.
  This field is usually found in the sales document header or item overview screen.
  
  
  
  Check Master Data:
  
  Verify that the customer master (XD01/XD02) and material master (MM01/MM02) have the correct sales area data maintained, including the distribution channel.
  Ensure that the sales area (Sales Organization + Distribution Channel + Division) is properly assigned.
  
  
  
  Configuration Check:
  
  In SPRO, verify the sales area configuration:
  
  Sales and Distribution ? Sales ? Sales Areas ? Maintain Sales Areas
  Confirm that the sales organization and distribution channel combination exists.
  
  
  Check if the distribution channel is mandatory in the sales document type configuration.
  
  
  
  User Input Validation:
  
  If the distribution channel is supposed to be defaulted, check user exits, BADIs, or custom code that might be clearing or not setting this field.
  
  
  
  Data Consistency:
  
  If the error occurs during data upload or interface processing, ensure the distribution channel is correctly mapped and passed.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  VA01 / VA02 / VA03 — Create/Change/Display Sales Order
  VD01 / VD02 / VD03 — Create/Change/Display Customer Master (Sales Area Data)
  MM01 / MM02 — Create/Change Material Master
  SPRO — Customizing Implementation Guide
  
  
  
  Tables:
  
  TVTWT — Distribution Channels
  VBAK — Sales Document Header (field VTWEG = Distribution Channel)
  KNA1 / KNVV — Customer Master (Sales Area Data includes Distribution Channel)
  MVKE — Material Sales Data (includes Distribution Channel)
  
  
  
  Notes:
  
  Distribution channel is a mandatory field in many sales processes because it affects pricing, availability, and reporting.
  If the system is integrated with other modules (e.g., APO, CRM), ensure consistent distribution channel data across systems.
  
  
  
  
  Summary:
  
  The error WRF_APC126 indicates that the distribution channel is missing where it is required. To resolve it, enter the distribution channel in the sales document or master data, verify configuration, and ensure data consistency.