Has anyone seen Hakeem Nicks? Tom Coughlin hasn’t and he’s not too happy about it. On Thursday, the Giants’ big-play wideout missed yet another OTA session without any explanation. He’s been a no-show to the Giants’ voluntary offseason training program for the last two weeks, a fact that baffles Coughlin, who said that just weeks ago, Nicks had told him he’d be in attendance. “At one point, Hakeem told me that he was going to be here, and then he was not here,” the coach said. “Now, the strictest interpretation, as everybody knows, is it’s a voluntary program.” Coughlin can’t make anyone attend a round of training sessions that are not mandatory. But Nicks’ absence, he said, is frustrating. He said he was “certainly” disappointed in the receiver’s disappearing act. “It’d be great to have all of our guys working and feeling good about the progress we’re making, and that type of thing,” Coughlin said. “That’s just from a coach’s perspective. You deal with some of this, pretty much on a yearly basis. And it’s a product of our system and that’s the way it is. I can complain all I want, but nevertheless, it is our system.” There are unwritten rules in the system and Coughlin said that “most of the time,” if players are going to miss an OTA session, “they’ll be sure to let you know.” Wideout Victor Cruz has been a no-show for the entire offseason program as he continues to hammer out a long-term extension. And defensive ends Justin Tuck and Jason Pierre-Paul skipped Thursday’s practice, but Coughlin said he was “aware of those circumstances.