I get the error if i try to pass a rectangle with all zeros to Lightmeter (rectangle).vi.
I have recently moved to win 7 and labview 2010. On My previous setup xp and labview 8.5 I could pass a rectangle to it with all zeros without getting an error. The work around is of course very simple (do not use an empty rectangle) but I thought I should just mention it.
I guess I have to put an if statement testing if the rectangle is empty then do not use lightmeter.vi. but I shouldn't have to if the ROItoMask worked properly.