The Hurricanes and Flyers were in agreement in principle on Tony DeAngelo going to Carolina for a prospect and Philadelphia retaining 50 percent of his remaining $5 million salary and cap hit for next season. But my understanding is that the NHL took issue with DeAngelo going back to Carolina within a year of his trade from the Hurricanes. There's language in the CBA about a player returning within 12 months, especially on a retained salary, as being possible circumvention.
I believe both the Flyers and Hurricanes have argued with the league about this, saying: 1) His contract wasn't even signed with Carolina; it was Philadelphia that signed him last summer to a two-year, $10 million deal. And 2) Chuck Fletcher was the GM who traded for DeAngelo and signed him, and he's no longer there so how could any of this be a circumvention?