The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  7  0  7 21 21  0  7 21 14 14 14  0  7 21 14 42 42
 0  0  7 35 21 14 28 14  7 35  7 28 35 28  0 14  0  7

generates a code of length 18 over Z49 who´s minimum homogenous weight is 98.

Homogenous weight enumerator: w(x)=1x^0+60x^98+168x^105+2058x^108+54x^112+12x^119+48x^126

The gray image is a code over GF(7) with n=126, k=4 and d=98.
This code was found by Heurico 1.16 in 0.00251 seconds.