mxCreateCellMatrix and mxSetCell are not supported in Simulink Coder

My Simulink model with S-Function does not work in External Mode-Simulink. Because the mxCreateCellMatrix and mxSetCell are not supported in simulink coder. How can I solve the problem? this C-program part looks thus:

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mxArray *pm, *chrAry;

mwSize m, n;

mwIndex indx; ............... .................

/ put the names of the output channels in a cell-array variable called "OutList" in the base matlab workspace

       m = NumOutputs;
       n = 1;
       pm = mxCreateCellMatrix(m, n);
       for (i = 0; i < NumOutputs; i++){
          j = CHANNEL_LENGTH - 1;
          while (ChannelNames[i*CHANNEL_LENGTH + j] == ' '){
             j--;
          }
          strncpy(&OutList[0], &ChannelNames[i*CHANNEL_LENGTH], j+1);
          OutList[j + 1] = '\0';

          chrAry = mxCreateString(OutList);
          indx = i;
          mxSetCell(pm, indx, chrAry);
          //mxDestroyArray(chrAry);