The generator matrix

 1  0  0  0  0  1  1  1  2  1  1  0  2  1  1  4  4  1  6  1  4  1  2  1  1  0  4  0  1  1  1
 0  1  0  0  0  0  1  1  1  2  5  6  1  4  4  1  2  3  0  1  2  7  1  7  6  0  0  1  0  3  0
 0  0  1  0  0  0  4  0  4  1  5  1  6  7  5  3  1  5  1  5  6  3  7  6  7  1  1  0  7  0  0
 0  0  0  1  0  1  0  1  3  2  7  7  1  7  1  0  4  6  1  7  1  2  0  3  0  1  6  2  5  2  0
 0  0  0  0  1  1  3  2  3  5  2  3  0  6  3  7  7  0  4  5  3  5  4  5  2  2  5  1  4  6  0
 0  0  0  0  0  4  4  0  0  0  4  4  4  0  0  4  0  0  0  0  4  4  4  0  4  4  4  4  0  0  0

generates a code of length 31 over Z8 who´s minimum homogenous weight is 23.

Homogenous weight enumerator: w(x)=1x^0+112x^23+586x^24+1206x^25+2134x^26+3482x^27+4957x^28+7358x^29+7894x^30+9438x^31+8569x^32+7460x^33+5127x^34+3540x^35+1942x^36+974x^37+457x^38+190x^39+72x^40+26x^41+3x^42+6x^43+1x^44+1x^46

The gray image is a code over GF(2) with n=124, k=16 and d=46.
This code was found by Heurico 1.11 in 20 seconds.