The generator matrix

 1  0  0  0  1  1  1  1  1  X  1  1  1  1  1  1  1 aX aX  1  X  1  1  1  1 (a+1)X  1  1  1  1  1  1  1  1  1  1  1  X  1  1  1  1 (a+1)X  1  1  1  1
 0  1  0  0  0  X  X (a+1)X+1 aX+1  1 aX+a a+1 X+a (a+1)X+a+1  1  X  0  1 (a+1)X  1  1 a+1 X+1 a+1 (a+1)X+a+1  1  X aX+a+1 X+a  a aX+a  0  a X+1 (a+1)X+1  X X+1  X X+a aX+1 (a+1)X+a (a+1)X+a+1  1 aX+a (a+1)X+a a+1  0
 0  0  1  0  1 (a+1)X+a (a+1)X+a+1  X aX+a aX+a aX  0 aX+a+1 aX+1 a+1 X+a  0 X+a  1 X+a+1 X+1 (a+1)X aX X+a (a+1)X+1 (a+1)X aX+a+1 (a+1)X+a  a X+a+1 (a+1)X+a+1 a+1  a aX+1 aX+1  X  X  1  1 aX (a+1)X+a (a+1)X+a (a+1)X+a (a+1)X+a+1  1 X+a+1  X
 0  0  0  1 a+1  a  1 (a+1)X+a aX (a+1)X+a (a+1)X+1 X+a+1  a aX+a  0 aX a+1 (a+1)X X+a X+a X+1 aX (a+1)X aX+a+1 a+1 a+1 a+1  X X+a aX+1 X+a+1 X+a (a+1)X+a+1  a a+1 X+1  1 (a+1)X+a+1  0 X+a+1 aX (a+1)X+1 aX (a+1)X+a  0  a  X
 0  0  0  0  X  0 aX  0  0  0 aX  X aX  X aX  X aX aX aX  X (a+1)X  0  X aX (a+1)X  X (a+1)X  X  X  0  X  0  0 (a+1)X aX (a+1)X  0  X aX  0 aX  0 (a+1)X  0  X aX  X

generates a code of length 47 over F4[X,sigma]/(X^2) who´s minimum homogenous weight is 123.

Homogenous weight enumerator: w(x)=1x^0+396x^123+534x^124+564x^125+840x^126+2160x^127+3132x^128+2388x^129+2928x^130+4968x^131+7440x^132+4968x^133+6660x^134+10344x^135+13224x^136+9024x^137+11352x^138+16440x^139+21087x^140+12708x^141+16032x^142+19824x^143+21141x^144+11940x^145+12528x^146+14136x^147+13218x^148+6288x^149+4404x^150+4728x^151+3843x^152+1224x^153+552x^154+732x^155+267x^156+48x^157+33x^160+24x^164+15x^168+6x^172+3x^176

The gray image is a linear code over GF(4) with n=188, k=9 and d=123.
This code was found by Heurico 1.16 in 167 seconds.