OOo is silent when when a user attempts to open Report Designer produced report
embedded in a base file on an OOo installation without the extension being
installed, or disabled.

Steps to reproduce:

Disable the Report Designer extension in your installation using Extension Manger.
Completely close OOo.
Download the attached Base file, ExerciseLog_RPT.
Open the file with OOo
Switch to the Reports section and double click on the report Designer_1.
Nothing happens!

This is a basic usability flaw - Let's say the suer had just received the file
from another person via email and was not aware of the Report Desginer
extension. ( it was not installed by his network admin person perhaps ) Most
likely the user believes the report should have run - trys again to run it,
fails. No message. He tries to run either of the other two - voila, no problem.

Right now the user believes the base file is somehow corrupt, which it is not
and if the report Designer_1 was the only thing in the file that he really cared
about anyway is at a loss for what to do next.

OOo should open a warning box telling the user why the report does not run, and
that installing Report Designer Extension will allow it to do so.