I work in a company of 600+ emp. Supervisor has gotten complaints about my direct approach from 5 peoples?

Complaints have been received about my direct approach in my communicating with people. I don't coddle people, and I'm very direct. Complaints seem to be coming from people under one particular company officer, whom I've only had direct interaction with maybe 3x in 16 months. Yet he is the one really raising the flag and complaints. Most of the instances being described, I don't even remember. How do I deal with this situation