CHAP Challenge Limit

[s2art]

Hi,

I am using hashcat to brute force decrypt my CHAP sessions.  (-m 4800).  All works fine for Challenge Salt length of 16 bytes, but I get an error when trying to use longer Challenge Salts (My Packet Capture has Value of length 26).  

Can anyone guide me to the error of my ways?

Thanks in anticipation

S2Art