Selector on PDF then error HRESLT E_FAIL has been returned from a call to a COM component

Hi,

So I was using the Launch iExplorer to try to get text from a NATIVE PDF - the problem was that it could only select the whole page instead of specific elements. Then finally I got it work by checking and unchecking some boxes, however, it could only read the a group of text in which the number that I wanted is inside that box it outlined. So, with no option, I clicked on that box, and got an error HRESLT E_FAIL has been returned from a call to a COM component. This is really frustrating. Can you help? Thanks.