The generator matrix

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

generates a code of length 11 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 21.

Homogenous weight enumerator: w(x)=1x^0+14x^21+54x^22+8x^24+4x^27

The gray image is a code over GF(3) with n=99, k=4 and d=63.
This code was found by Heurico 1.16 in 0.000249 seconds.