The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  0  1  1  1  1  1  1  1  1
 0  1  1  a a^7*X+a^2 a^3 a^7*X+2 a^7*X+a^6 a^5 a^7  0 a^7 a^5 a^7*X+a^6 a^3  1  a a^7*X+a^2 a^7*X+1  1 a^5 a^7*X+a^2 a^7*X+a^6 a^7*X+2 a^7*X+2 a^7 a^6*X+2 a^7*X+1
 0  0 a^7*X  0 a^7*X  X a^6*X a^6*X 2*X a*X a^7*X a*X  X a*X  X  X a^6*X 2*X a^7*X a^7*X  X a^2*X a*X a^2*X a^3*X a^2*X a^6*X a*X
 0  0  0  X a^7*X a^7*X  X a*X  X a^2*X a^5*X a^6*X a^5*X a^3*X  0 a^6*X a^2*X a^7*X  X 2*X a*X a*X a^7*X a^5*X a^5*X a^6*X a^6*X a*X

generates a code of length 28 over F9[X]/(X^2) who´s minimum homogenous weight is 198.

Homogenous weight enumerator: w(x)=1x^0+520x^198+432x^200+288x^201+1088x^207+1944x^208+10368x^209+3024x^210+1032x^216+31104x^217+82944x^218+16416x^219+1304x^225+124416x^226+221184x^227+32760x^228+1456x^234+872x^243+288x^252

The gray image is a linear code over GF(9) with n=252, k=6 and d=198.
This code was found by Heurico 1.16 in 13.2 seconds.