The generator matrix

 1  1  1  1  1  1  1
 0  X  0  X a*X a*X a^2*X
 0  0  X a^7*X a*X a^2*X a^6*X

generates a code of length 7 over F9[X]/(X^2) who´s minimum homogenous weight is 45.

Homogenous weight enumerator: w(x)=1x^0+168x^45+224x^54+5832x^56+336x^63

The gray image is a linear code over GF(9) with n=63, k=4 and d=45.
This code was found by Heurico 1.16 in 0.000859 seconds.