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

generates a code of length 40 over Z49 who´s minimum homogenous weight is 217.

Homogenous weight enumerator: w(x)=1x^0+138x^217+444x^224+294x^228+426x^231+3528x^235+426x^238+10584x^242+282x^245+234x^252+216x^259+126x^266+102x^273+6x^280

The gray image is a code over GF(7) with n=280, k=5 and d=217.
This code was found by Heurico 1.16 in 0.18 seconds.