The generator matrix

 1  0  0  0  0  1  1  1  1  1  0  1  1  1  1
 0  1  0  0  0  0  3  1  7  4  0  6  1  8  0
 0  0  1  0  0  0  7  8  6  3  1  7  3  2  0
 0  0  0  1  0  1  7  1  8  4  8  4  2  6  0
 0  0  0  0  1  8  6  3  3  1  8  1  2  6  0
 0  0  0  0  0  6  3  0  3  3  6  6  0  6  0

generates a code of length 15 over Z9 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+378x^18+522x^20+1940x^21+3642x^23+6314x^24+17484x^26+11692x^27+42612x^29+15176x^30+42312x^32+15878x^33+11190x^35+7232x^36+336x^38+434x^39+2x^42+2x^45

The gray image is a code over GF(3) with n=45, k=11 and d=18.
This code was found by Heurico 1.16 in 31.2 seconds.