The generator matrix

 1  0  1  1  1  1  1  1
 0  1 a^6*X+1  a a^6*X+a^2 a^3 a^6*X+a^4 a^5

generates a code of length 8 over F8[X]/(X^2) who´s minimum homogenous weight is 49.

Homogenous weight enumerator: w(x)=1x^0+448x^49+504x^56+3136x^57+7x^64

The gray image is a linear code over GF(8) with n=64, k=4 and d=49.
This code was found by Heurico 1.16 in 0.000318 seconds.