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

generates a code of length 33 over Z49 who´s minimum homogenous weight is 189.

Homogenous weight enumerator: w(x)=1x^0+78x^189+150x^196+2058x^198+90x^203+6x^224+18x^231

The gray image is a code over GF(7) with n=231, k=4 and d=189.
This code was found by Heurico 1.16 in 0.00645 seconds.