SYMPTOM:
A "Subscript out of range" error is thrown when placing a report into outline view mode when all objects are on the rows of a report in Developer. The error can be within the report editor or as a separate window like in the screenshot below.

The report runs fine if not viewed in outline mode. The error also only happens if all objects are on the templates and subtotals are enabled before the report is placed into outline mode.
CAUSE:
This is a known issue with Strategy.
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.
WORKAROUND:
Place the metrics into the columns of the report in design mode.