How To Fix WV279 - External supplier &1 is not a permitted source of supply

WV279 - Overview

• Message type: E = Error

• Message class: WV - Messages about Sales Price Calculation

• Message number: 279

• Message text: External supplier &1 is not a permitted source of supply

What causes this issue?

The source of supply check has found that external vendor &V1& is not a
valid source of supply.
The current source of supply key "&V3" (external supply before internal
supply) first checks the the external vendor entered. If this vendor is
not valid, the source of supply determination function searches for
internal vendors. External vendor &V4& was found using this method,
however.

System Response

No price can be calculated for material &V2&.

How to fix this error?

If desired, repeat the calculation with vendor &V4&.
Alternatively, check the settings that are relevant for determining the
source of supply, such as the source of supply key, purchasing info
records if using external procurement, or supplying sites if using
internal procurement, and so on.
Links for checking master data and Customizing:
<DS:TRAN.MM43>Display Material Master Data</>
<DS:TRAN.ME1M>Display List of Info Records</>
<DS:TRAS.WB03>Display Plant</>
<DS:TRAN.MK03>Display Vendor</>
<DS:SIMG.SIMG_CFMENUSAPCOMKJ>Reference Purchasing Organization</>

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WV279 - External supplier &1 is not a permitted source of supply ?

  The SAP error message WV279, which states "External supplier &1 is not a permitted source of supply," typically occurs in the context of procurement and sourcing within the SAP system. This error indicates that the external supplier you are trying to use for a purchase order or procurement process is not recognized as an authorized or permitted source of supply for the specific material or service you are trying to procure.
  Causes:
  
  Supplier Not Approved: The supplier may not be approved or set up in the system as a valid source for the specific material or service.
  Source List Configuration: The source list for the material may not include the external supplier, or the supplier may be marked as inactive.
  Purchasing Info Record: There may be no purchasing info record for the material and the supplier combination.
  Material Master Settings: The material master data may not be configured to allow procurement from the specified supplier.
  Plant-Specific