The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+50x^15+122x^16+220x^17+576x^18+1568x^19+2120x^20+4824x^21+3156x^22+7108x^23+3724x^24+4928x^25+1828x^26+1488x^27+676x^28+264x^29+60x^30+26x^31+9x^32+4x^33+12x^34+4x^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 5.71 seconds.