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

generates a code of length 26 over F9[X]/(X^2) who´s minimum homogenous weight is 198.

Homogenous weight enumerator: w(x)=1x^0+320x^198+648x^200+200x^207+5184x^209+80x^216+40x^225+88x^234

The gray image is a linear code over GF(9) with n=234, k=4 and d=198.
This code was found by Heurico 1.16 in 0.00745 seconds.