The benefit is only to be gained by one party, who is therefore trying to convince the other party to let them off the obligations arising under the original agreement
Whenever a party fails to perform an obligation, or performs defectively (badly/unsatisfactorily) an obligation, or indicates in advance that they will not be performing as agreed
If a contract requires entire performance, and a party fails to perform the contract in its entirety, they are entitled to nothing under the contract from the other party
If the other party prevents a party from carrying out his or her obligations because of some act or omission, then the rule in Cutter v Powell cannot apply