No price for fixed-price co-product &1 &2

What causes this issue?

No price was found for the
<DS:GLOS.356E4A3641AA3F85E10000009B38F982>fixed-price co-product</>.

System Response

The system does not calculate any
<DS:GLOS.3526B637AFAB52B9E10000009B38F974>variances</>.

How to fix this error?

Check the following settings in the accounting view of the material's
master record:
If the price control indicator is set to S, check the entry in the
<LS>Standard price</> field.
If the price control indicator is set to V, check the entry in the
material master that is used to valuate the material at goods receipt
according to the <LS>goods received valuation for order delivery</>.
<DS:TRAN.MM03>Display material master</>
To display the valuation of goods received for order delivery, go into
Customizing for Product Cost by Order or Product Cost by Period.

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.