In your case miner has to recreate DAGs but it does not reallocate memory on GPU, so it can fail only if your PSU is weak (generation DAG requires more power than mining itslef) or GPUs are overclocked too much.
You can try "-gser 1" or "-gser 2" if it is PSU. If not and you don't want to reduce clocks, there is nothing that you can do with this miner if you want to mine ETC solo.
You can also try "-allcoins -1" option (note not "1" but "-1") to recreate DAGs at start, but in an hour it will do it again. Though, if it works, you can set "-r 60" to restart miner before it, but it is not smart solution anyway.