The generator matrix

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

generates a code of length 23 over Z8 who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+62x^15+148x^16+306x^17+570x^18+1088x^19+2196x^20+3756x^21+5269x^22+5880x^23+5275x^24+3872x^25+2241x^26+1116x^27+551x^28+244x^29+103x^30+42x^31+20x^32+14x^33+9x^34+4x^35+1x^36

The gray image is a code over GF(2) with n=92, k=15 and d=30.
This code was found by Heurico 1.16 in 8.34 seconds.