What version of SolidWorks are you using?
What are the thread specification?
From the looks of your screenshot you're trying to put pipe taps on both sides of a thru hole. What we've had to do is to add a 2nd pipe tap on the opposite face where you have the thru hole starting since the start end will have the cosmetic threads. If you're using 2017 you can use the advanced hole wizard & it will allow you to make a single feature that would have taps on both ends. Anything before that & you have to add the 2nd tap to the other end
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