Ethereum wallet length exception

Hi folks,

I am trying open my Ethereum wallet from my saved wallet.json file.  I have converted the file using this as suggested in another post I found searching for this issue;

https://github.com/magnumripper/JohnTheR...um2john.py

I am attempting this with minimal options from the command line so as to not confuse the process and keep it a simple as possible to troubleshoot.  Here is the command issued:

hashcat64.exe -m 15700 hash.txt -D1 -a 3 hash?l?l?l

The error I get follows:

Hashfile 'hash.txt' on line 1 (hash.txt:<INSERT HASH HERE>): Line 
-length exception
No hashes loaded.

Can anyone point me in the right direction to get past this?
Thanks in advance....

BTW: If someone can help me get this open I will gladly tip them