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

generates a code of length 37 over Z49 who´s minimum homogenous weight is 203.

Homogenous weight enumerator: w(x)=1x^0+276x^203+576x^210+2058x^216+420x^217+12348x^223+330x^224+282x^231+234x^238+150x^245+114x^252+18x^259

The gray image is a code over GF(7) with n=259, k=5 and d=203.
This code was found by Heurico 1.16 in 0.16 seconds.