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

generates a code of length 54 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 99.

Homogenous weight enumerator: w(x)=1x^0+322x^99+132x^102+312x^105+5048x^108+408x^111+120x^114+142x^117+62x^126+12x^135+2x^144

The gray image is a code over GF(3) with n=486, k=8 and d=297.
This code was found by Heurico 1.16 in 99.9 seconds.