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

generates a code of length 87 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+45x^74+89x^76+2x^77+95x^78+44x^79+94x^80+84x^81+89x^82+114x^83+73x^84+704x^85+68x^86+1216x^87+67x^88+656x^89+59x^90+124x^91+60x^92+74x^93+57x^94+36x^95+60x^96+12x^97+52x^98+2x^99+42x^100+4x^101+34x^102+17x^104+9x^106+7x^108+2x^110+1x^112+1x^114+1x^116+1x^138

The gray image is a code over GF(2) with n=348, k=12 and d=148.
This code was found by Heurico 1.16 in 2.33 seconds.