Ethash on Arc A750 Failed to allocate DAG on GPU 0. Please check if your swap file is big enough.

[shou692199]

I'm mining ethw on my Arc A750 with this config:
wallet=0x399B4D621877F0Bf8A51B90a99c443600d158FA0 email=<my wmail> coin=ETHW pool1=ethw.poolbinance.com:1800 pool2=ethw.poolbinance.com:25 pool3=ethw.poolbinance.com:443 rigName=lbxrb1221.001 rigPassword=123456 devices=0
but I got the error:
Failed to allocate DAG on GPU 0. Please check if your swap file is big enough.

I had set swap space to 16G~32G but nothing worked.