It happens regularly that artists, rightly or wrongly, are unhappy with their management, while the management feels that defaulting is not an issue. The artist believes they can easily terminate the contract, but unfortunately it is easier said than done. 

Either the contract, the rules of law or jurisprudence can sway the manager to make a claim against the artist. The manager believes they are still entitled to receiving their commission. A battle between parties is difficult because every case is always different from the previous ones. A compromise is often the best option and much better than a long and costly procedure to wait for an uncertain outcome. In these cases there is almost never a winner.