No data selected for this time period

What causes this issue?

There are no billing documents relevant for declaration for the period
which you specified.
When you create the KOBRA declaration, there can be another reason for
this system behavior:
The commodity codes of all materials relevant for declaration are
stored in the report itself. If no material with such a commodity code
has been exported or dispatched in the period to be reported, you do
not have to create a declaration.

System Response

The system could not select data.

How to fix this error?

Change the selection parameters and restart the report.

Error message extract from SAP system. Copyright SAP SE.