Using hashcat to find v3 ethereum wallet password

[phildo]

Ok- so I've tried:

hashcat3.6 -m 15700 -a 0 -w 3 --scrypt-tmto 4 hash.txt password.txt

Now I get:

Increasing single-block device memory allocatable for --scrypt-tmto 4.
Cannot allocate enough device memory. Perhaps retry with -n 1.

Any ideas? Thanks for your help!