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
 0  X  0  0  0  X  X  X a*X a^3*X  0  X a*X a^6*X a^5*X 2*X a^6*X 2*X a^6*X a^6*X  0  X a*X a^3*X a^6*X a^3*X a^6*X a^6*X  0
 0  0  X  0  0 a^7*X a^6*X a*X 2*X a^7*X  X a^7*X a*X a^2*X  X a^7*X  X a*X a^7*X 2*X a^3*X a^7*X a^2*X  0  X a^5*X a^6*X  X  0
 0  0  0  X  0 a^7*X  X a^2*X a^2*X a^6*X a^3*X a^6*X a^3*X a^5*X  X  X a^5*X 2*X 2*X a^5*X a^3*X a*X a*X a*X  0 a^7*X 2*X a^7*X  0
 0  0  0  0  X a^6*X 2*X a^3*X  X  X a*X a*X  X a^2*X  0 2*X a^5*X a^7*X a^5*X a^3*X a^2*X a^2*X  0  X a*X a^5*X a^3*X  0 a^2*X

generates a code of length 29 over F9[X]/(X^2) who´s minimum homogenous weight is 189.

Homogenous weight enumerator: w(x)=1x^0+360x^189+2048x^198+4088x^207+6408x^216+10280x^225+472392x^232+14168x^234+12896x^243+7040x^252+1760x^261

The gray image is a linear code over GF(9) with n=261, k=6 and d=189.
This code was found by Heurico 1.16 in 38.2 seconds.