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

generates a code of length 91 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 183.

Homogenous weight enumerator: w(x)=1x^0+72x^183+6x^192+2x^207

The gray image is a code over GF(3) with n=819, k=4 and d=549.
This code was found by Heurico 1.16 in 0.322 seconds.