about custom charset

[bbcjared]

You need to specify mask as it tells you to:
(mask at the end)

Code:

hashcat.exe -m 15700 -D 1,3 -w 3 -i --increment-min 8 --increment-max 12 hashcode.txt -1 abcdefghijklmnopqrstuvwxyz0123456789 -a 3 ?1?1?1?1?1?1?1?1?1?1?1?1