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  2  0  2  1  0  0  0  2  4  2  1  4
 0  2  0  0  0  0  0  0  0  0  4  6  2  2  4  2  2  6  0  0  2  0  2  2  2  2  4  4  4  4  2  0  2  2  2  0
 0  0  2  0  0  0  0  0  0  0  6  6  6  4  2  2  0  2  4  2  4  6  6  4  2  0  6  0  2  4  6  2  2  4  4  4
 0  0  0  2  0  0  4  6  2  2  2  4  6  2  2  0  4  2  6  2  2  4  0  6  0  2  0  0  2  2  0  6  0  4  2  4
 0  0  0  0  2  0  6  6  6  4  0  0  0  0  4  6  2  0  4  6  0  2  6  6  4  0  2  4  0  4  2  2  4  6  4  0
 0  0  0  0  0  2  2  4  6  2  0  0  0  0  6  2  4  2  0  6  4  2  0  2  4  6  4  4  6  0  0  2  6  0  4  4

generates a code of length 36 over Z8 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+164x^28+4x^29+422x^30+76x^31+722x^32+276x^33+1094x^34+748x^35+1343x^36+524x^37+1146x^38+324x^39+700x^40+92x^41+354x^42+4x^43+132x^44+56x^46+9x^48+1x^52

The gray image is a code over GF(2) with n=144, k=13 and d=56.
This code was found by Heurico 1.16 in 1.9 seconds.