Simulink coder converts fromFile block into fixed internal array with enumerated values

Hi I have a working Simulink model that uses a FromFile block to read the input data. When I build the model, it creates an internal array and initializes it with the entire contents of the file. The file is 3.8 Msamples long.

/* Start for FromFile: '<Root>/From File' */
{
  static const real_T tuData[3847002] = { 0.0, 0.00025, 0.0005, 0.00075, 0.001,
    0.00125, 0.0015, 0.00175, 0.002, 0.0022500000000000003, 0.0025, 0.00275,
    0.003, 0.0032500000000000003, 0.0035, 0.00375, 0.004, 0.00425,
    0.0045000000000000005, 0.00475, 0.005, 0.00525, 0.0055, 0.00575, 0.006,
    0.00625, 0.0065000000000000006, 0.00675, 0.007, 0.00725, 0.0075, 0.00775,

This is idiotic. How can I get the code generator to create C code that uses a file read?

Thanks Sean