The generator matrix

 1  1  1  1  1  1
 0  7  0  0  0  7
 0  0  7  0  0 35
 0  0  0  7  0 35
 0  0  0  0  7 35

generates a code of length 6 over Z49 who´s minimum homogenous weight is 14.

Homogenous weight enumerator: w(x)=1x^0+90x^14+600x^21+2790x^28+6660x^35+100842x^36+6666x^42

The gray image is a code over GF(7) with n=42, k=6 and d=14.
This code was found by Heurico 1.16 in 0.196 seconds.