matrix_type=gras_datadesc_matrix(gras_datadesc_by_name("double"),
NULL);
request_type=gras_datadesc_array_fixed("s_matrix_t(double)[2]",matrix_type,2);
matrix_type=gras_datadesc_matrix(gras_datadesc_by_name("double"),
NULL);
request_type=gras_datadesc_array_fixed("s_matrix_t(double)[2]",matrix_type,2);