The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  3  3  3
 0  3  0  0  0  0  3  6  6  0  0  3  3  3  3  3  3  3  0  6  0  6  0  6  0  3  3  6  0  3  3  0  6  0  3  6  0  3  3  3  6  6  6  3  6  3  3  3
 0  0  3  0  0  3  6  0  6  0  3  3  6  6  0  3  0  3  3  3  3  0  0  6  6  3  6  0  6  3  6  3  6  0  3  0  3  3  0  0  3  6  0  3  0  6  6  0
 0  0  0  3  0  6  6  3  0  3  3  0  0  3  6  3  3  6  6  0  0  6  6  6  6  6  0  0  3  3  3  3  0  0  3  3  0  6  0  3  0  3  0  0  6  3  3  6
 0  0  0  0  3  6  6  6  6  6  0  6  0  0  6  6  0  3  0  0  6  6  3  6  3  6  6  0  0  0  3  6  0  6  3  0  3  0  3  6  6  3  6  0  0  6  3  3

generates a code of length 48 over Z9 who´s minimum homogenous weight is 90.

Homogenous weight enumerator: w(x)=1x^0+134x^90+108x^93+216x^96+234x^99+30x^108+4x^117+2x^135

The gray image is a code over GF(3) with n=144, k=6 and d=90.
This code was found by Heurico 1.16 in 0.0969 seconds.