The generator matrix

 1  1  1  1  1  1  1
 0  X  0  0  X  X a*X
 0  0  X  0 a^7*X a^6*X a*X
 0  0  0  X a^7*X  X a^5*X

generates a code of length 7 over F9[X]/(X^2) who´s minimum homogenous weight is 36.

Homogenous weight enumerator: w(x)=1x^0+280x^36+840x^45+2576x^54+52488x^56+2864x^63

The gray image is a linear code over GF(9) with n=63, k=5 and d=36.
This code was found by Heurico 1.16 in 0.0399 seconds.