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

generates a code of length 50 over Z8 who´s minimum homogenous weight is 40.

Homogenous weight enumerator: w(x)=1x^0+136x^40+16x^42+267x^44+128x^46+393x^48+1024x^49+224x^50+1024x^51+365x^52+128x^54+218x^56+16x^58+114x^60+36x^64+5x^68+1x^76

The gray image is a code over GF(2) with n=200, k=12 and d=80.
This code was found by Heurico 1.16 in 1.06 seconds.