Claymore`s Dual Ethereum Miner is very popular among miners Ethereum, Ethereum Classic and other cryptocurrency miners using the Dagger-Hashimoto algorithm. As you know, one of the features of this algorithm is the ever-increasing DAG file with each new epoch. For Ethereum, the current 296 epoch, and for Ethereum Classic, the 303 epoch. And just the ETC miners have already encountered such a problem as limiting support for epoch above 299 for Claymore`s Dual Miner versions 14 and below. Those with the transition to the 300 era, the old versions of the miner cease to work. To avoid downtime of mining equipment during the transition of Ethereum from 299 to the 300 epoch, it is imperative to update your miner to the latest version of Claymore`s v15.0, which, in addition to the ability to change memory timings, also got rid of the mining limit for the 299 epoch. In addition to Claymore`s, you can switch to the second most popular Phoenix miner, which was originally devoid of such restrictions.