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
 0  4  0  0  0  0  0  4  0  4  4  0  4  4  4  4  0  0  0  0  4  4
 0  0  4  0  0  0  4  0  4  4  4  4  4  4  0  0  0  0  0  4  4  0
 0  0  0  4  0  4  4  4  4  0  0  0  4  4  4  0  0  0  4  4  0  0
 0  0  0  0  4  4  0  0  4  0  4  4  4  0  4  4  0  4  4  0  0  0

generates a code of length 22 over Z8 who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+15x^20+96x^22+15x^24+1x^44

The gray image is a code over GF(2) with n=88, k=7 and d=40.
This code was found by Heurico 1.16 in 0.00212 seconds.