The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1
 0  X  0  0  0  0  0  0  0  0 2X  X  X  X  X  X  X  X  X  X 2X  0  0  X  X 2X  X  0  0  0  X  0 2X  X 2X  X 2X  X 2X  0 2X  X  0 2X  X  0 2X 2X 2X  X 2X  0  X 2X 2X 2X  0 2X  X 2X  0  0 2X  0  0  X  X  0 2X  X 2X 2X  0  X 2X  0  X 2X 2X 2X 2X  0  0  0  0  0  X  X 2X 2X  0  X  X  0 2X  X  0  X  X
 0  0  X  0  0  0  X  X  X 2X  0  X 2X  X  X 2X 2X  0  X  X  0  X  0 2X  0  X  0  X  0  0  X  X  0  0  X  0  X  0  X  X  0  X  0  X  0 2X  X  0  0  X  0  X  X  0  0  X  0  X  0  X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X  0  0  0  X  X 2X  X  0  X  0  X  0  X  0  X  X 2X  X
 0  0  0  X  0  X 2X 2X  X 2X  0  0 2X 2X  0  0  X  X  X 2X  X  X  X 2X  0 2X  X  0 2X 2X 2X 2X  0  0  X 2X  0 2X  0  0 2X  X 2X  X  X  0 2X 2X  0  X  X  X  0 2X  X  X  0  0 2X 2X  0 2X  0  0  X  X  0  X  X  X  0  X  X 2X  0 2X  0  X 2X 2X 2X  0  0  X 2X  X 2X  0  0  0  X  0  0 2X  X  X  0  X 2X
 0  0  0  0  X 2X 2X  0 2X 2X  X  X 2X  X  0  X  X 2X 2X 2X 2X  X  X  0 2X  0  X 2X  0 2X  0  X  0  X  X 2X  X  0  0  X 2X  X  X 2X  0  X 2X  X 2X  0  X  0 2X  0  0  0 2X 2X  X  X 2X  X 2X  0  0  0 2X  X  X 2X  X 2X 2X  X  0  0  0  0  0  X 2X  0  X 2X 2X 2X 2X 2X  0  X  X  X  X  X  0 2X 2X  0  X

generates a code of length 99 over Z3[X]/(X^2) who´s minimum homogenous weight is 192.

Homogenous weight enumerator: w(x)=1x^0+52x^192+76x^195+162x^196+22x^198+324x^199+40x^201+28x^204+4x^207+16x^210+2x^213+2x^294

The gray image is a linear code over GF(3) with n=297, k=6 and d=192.
This code was found by Heurico 1.16 in 0.183 seconds.