The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  0  4  4  0  4  4  0  4  4  0  4  4  0  4  4  0  4  4  0  4  4  4  0  4  0  4  4  0  4  0  4  4  0  4  0  4  0  0  4  4  4  4  4  4  4  0  0  0  0  0
 0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  0  4  4  0  4  4  0  4  0  4  4  4  0  4  4  0  4  4  0  4  4  0  4  4  0  4  4  4  4  0  4  4  4  4  4  4  0  4  4  0  0  0  0  0  0  0  0  0
 0  0  0  4  0  0  0  0  0  0  0  4  4  4  4  4  4  4  0  4  4  4  4  0  4  0  4  4  4  4  0  4  0  0  0  4  0  4  0  4  4  4  0  4  4  0  4  0  0  4  4  0  0  0  0  0  0  0  4  4  4  4  0  0  0  0  0  0  0
 0  0  0  0  4  0  0  0  4  4  4  4  4  0  4  4  0  0  0  0  0  0  0  0  0  0  0  0  4  4  0  4  4  4  4  0  4  0  4  0  4  4  4  0  4  0  4  0  4  4  4  4  4  4  4  0  0  0  4  0  4  4  4  0  0  0  0  0  0
 0  0  0  0  0  4  0  4  4  4  0  0  0  0  4  4  4  4  0  0  0  0  0  0  0  0  0  4  4  0  4  0  4  4  0  4  4  4  0  4  4  0  0  4  4  4  4  4  0  0  4  4  4  4  0  4  4  4  0  4  4  0  0  0  0  0  0  0  0
 0  0  0  0  0  0  4  4  0  4  4  0  4  4  4  0  0  4  0  0  0  0  4  4  4  4  4  4  0  4  4  4  4  0  0  4  4  4  0  0  4  0  0  0  0  0  4  0  4  0  0  4  0  0  4  0  4  4  4  0  4  0  4  4  0  0  0  0  0

generates a code of length 69 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+63x^64+384x^69+63x^74+1x^138

The gray image is a code over GF(2) with n=276, k=9 and d=128.
This code was found by Heurico 1.16 in 0.12 seconds.