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Procedure

This error means that the system is not being able to cost the material because it's missing some parametrizations are missing in the system in order to calculate the correct cost.

So when we have this error we need to see which kind of product are we trying to cost, and to try to understand where the system is supposed to pick the price.

Go to MM03 to display the material, and check the field "Valuation Type" in the tab "Accounting 1".

Finance Service Line > CK380 - No valid source of supply could be found > image2019-7-29_10-44-19.png

As a general rule we have the following:

Everytime we are dealing with Purchased materials, we must have already a PO created.
Everytime we are dealing with a Produced material, we must have a BOM created.

However, it's possible to have other options, which are valid for both types of materials (produced + purchased):

Commercial Price (in WP1) or Planned Price (in PF1) -which should be a temporary solution until the system is correctly parametrized.
Special Procurement - to pick the price from other plant - IMPORTANT: The system only picks the costing from other plant in case both plants belong to the same company code.