Tab control acts like it is off but no

I have a tab control that has ceased to operate at run time. It acts like it is off when turned on. At the time of editing, I am able to click on the tabs and they change visually. When I run it, by clicking on the tabs does not change tabs.   I reduced the vi to a simple loop with a delay of 200ms and the tab, with nothing else. The controls on the tab is the only thing in vi.  I made sure that the tab is enabled in the Properties dialog box. I noticed a strange thing: the Navigation tab button (in properties), it is all grayed out.  Once again, the control tab in in fact active, but it behaves as if it was not. I tried to recompile. Is there another setting? Why key naviation is grayed out? I'm using LabVIEW 2015.  Thank you!

Ooops! Problem solved. I did somehow accidentally changed to a flag! Sorry for the premature post.

Tags: NI Software

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