help with the basics

[AwfulHacker]

so when i type 
hashcat64 -a 3 -m 0 hash.txt ?l?l?l?l?l?l0 -o cracked.txt

i get this 


D:\hashcat-5.1.0\hashcat-5.1.0>hashcat64 -a 3 -m 0 hash.txt ?l?l?l?l?l?l0 -o cracked.txt
hashcat (v5.1.0) starting...

* Device #1: WARNING! Kernel exec timeout is not disabled.
            This may cause "CL_OUT_OF_RESOURCES" or related errors.
            To disable the timeout, see: https://hashcat.net/q/timeoutpatch
OpenCL Platform #1: NVIDIA Corporation
======================================
* Device #1: GeForce GTX 1060 6GB, 1536/6144 MB allocatable, 10MCU

Hashfile 'hash.txt' on line 1 (256E7FC8BD23003238A6E55763A7371F ): Token length exception
No hashes loaded.

Started: Sat Aug 17 10:35:13 2019
Stopped: Sat Aug 17 10:35:13 2019

D:\hashcat-5.1.0\hashcat-5.1.0>


any help would be really... well helpful