The generator matrix

 1  0  1  1  1  1  1  1  1
 0  1 5X+1  3 5X+2  6 5X+4  5  X

generates a code of length 9 over Z7[X]/(X^2) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+294x^48+90x^49+1764x^55+252x^56

The gray image is a linear code over GF(7) with n=63, k=4 and d=48.
This code was found by Heurico 1.16 in 0.000384 seconds.