The generator matrix

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

generates a code of length 7 over F9[X]/(X^2) who´s minimum homogenous weight is 40.

Homogenous weight enumerator: w(x)=1x^0+1512x^40+168x^45+18144x^48+24192x^49+224x^54+244944x^56+145152x^57+96768x^58+336x^63

The gray image is a linear code over GF(9) with n=63, k=6 and d=40.
This code was found by Heurico 1.16 in 1.17 seconds.