The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+136x^23+444x^24+1100x^25+1912x^26+3342x^27+5030x^28+6800x^29+9138x^30+9780x^31+8773x^32+7160x^33+5146x^34+3376x^35+1838x^36+912x^37+438x^38+132x^39+38x^40+28x^41+6x^42+2x^43+4x^44

The gray image is a code over GF(2) with n=124, k=16 and d=46.
This code was found by Heurico 1.16 in 43.8 seconds.