No summarization version selected.

What causes this issue?

You did not select a summarization version for this report. The system
is not able to execute data selection, since the data in the
summarization tables is always stored in relation to a key from a
summarization version.

System Response

The report is not executed.

How to fix this error?

Make sure that you specify a summarization version for each cell of the
report. You can use variables for this, but they must be replaced, at
the latest, on the selection screen of the report.

Error message extract from SAP system. Copyright SAP SE.