The generator matrix

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

generates a code of length 29 over Z8 who´s minimum homogenous weight is 23.

Homogenous weight enumerator: w(x)=1x^0+226x^23+449x^24+1214x^25+994x^26+2240x^27+1587x^28+2866x^29+1689x^30+2332x^31+1072x^32+1106x^33+281x^34+224x^35+57x^36+30x^37+11x^38+2x^39+2x^40+1x^42

The gray image is a code over GF(2) with n=116, k=14 and d=46.
This code was found by Heurico 1.16 in 3.08 seconds.