why did my miner stop when I started to DAG # 354? and doesn't reboot by itself,

2020.06.11:05:45:24.320: GPU5 GPU5: Starting up... (0)
2020.06.11:05:45:24.320: GPU5 GPU5: Generating ethash light cache for epoch #352
2020.06.11:05:45:24.342: GPU3 GPU3: Starting up... (0)
2020.06.11:05:45:24.398: GPU6 GPU6: Starting up... (0)
2020.06.11:05:45:24.444: GPU2 GPU2: Starting up... (0)
2020.06.11:05:45:24.559: GPU4 GPU4: Starting up... (0)
2020.06.11:05:45:24.604: GPU1 GPU1: Starting up... (0)
2020.06.11:05:45:27.189: main Eth speed: 0.000 MH/s, shares: 5/0/0, time: 0:02
2020.06.11:05:45:27.189: main GPUs: 1: 0.000 MH/s (1) 2: 0.000 MH/s (0) 3: 0.000 MH/s (1) 4: 0.000 MH/s (1) 5: 0.000 MH/s (1) 6: 0.000 MH/s (1)
2020.06.11:05:45:28.011: GPU5 Light cache generated in 3.7 s (16.3 MB/s)
2020.06.11:05:45:28.248: GPU3 GPU3: Allocating DAG (3.77) GB; good for epoch up to #354
2020.06.11:05:45:28.280: GPU3 GPU3: Generating DAG for epoch #352
2020.06.11:05:45:28.520: GPU6 GPU6: Allocating DAG (3.77) GB; good for epoch up to #354
2020.06.11:05:45:28.575: GPU6 GPU6: Generating DAG for epoch #352
2020.06.11:05:45:28.814: GPU2 GPU2: Allocating DAG (3.77) GB; good for epoch up to #354
2020.06.11:05:45:28.849: GPU2 GPU2: Generating DAG for epoch #352
2020.06.11:05:45:29.109: GPU4 GPU4: Allocating DAG (3.77) GB; good for epoch up to #354

thank you for your help