Enter a quantity

What causes this issue?

You did not enter a base quantity for BOM explosion.
On the basis of the quantity entered, the system calculates the
quantity of the individual components to be used and proposes it for
the given goods movement.

System Response

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

How to fix this error?

Enter the quantity of the material whose bill of material is to be
exploded for the goods movement.

Error message extract from SAP system. Copyright SAP SE.