The Code Test Repository is not supported on an 8i database. You should get a message indicating this if you attemp to installon to this version. See attachment.
So this explains why you keep gettiong the message about installing a repository.
You should only get this message if you select any button that appears in the Code Test Section.
When you select to run any object, and you execute it. You are taken to the run TAB.
The New, Manage, Run all Tests, and Refresh button under Code Test, are all enabled. If you select ANY of these buttons SQL Navigator will check for a Repository. If you dont select anything you should never see the msg you reported.
Running the oject by pressing F9, Execute button on the toolbar or Execute button under parameters should not cause this message to appear, UNLESS you have the ‘Auto-create test case after code execution’ option checked.
I cant think of any other reason why this message keeps popping up for you, Do you have this option checked?