The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1
 0  X  0  0  0  X  X  X a*X a^3*X  0  X
 0  0  X  0  0 a^7*X a^6*X a*X 2*X a^7*X  X a^7*X
 0  0  0  X  0 a^7*X  X a^2*X a^2*X a^6*X a^3*X a^7*X
 0  0  0  0  X a^6*X 2*X a^3*X  X  X a*X a^6*X

generates a code of length 12 over F9[X]/(X^2) who´s minimum homogenous weight is 63.

Homogenous weight enumerator: w(x)=1x^0+1072x^63+1840x^72+6000x^81+14120x^90+472392x^96+19760x^99+16256x^108

The gray image is a linear code over GF(9) with n=108, k=6 and d=63.
This code was found by Heurico 1.16 in 8.21 seconds.