No Demand item(s) selected

What causes this issue?

No Demand item(s) selected. Common balanced quantity cannot be
calculated.

System Response

Assignment of selected items to a simulated nomination with
simultaneous Demand-Supply-Pegging not possible.

How to fix this error?

Select one Demand item

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.