How to acquire individual elements one by one from a workspace row vector in Simulink?

Objective

I have accessed a row vector, x, from workspace using "From Workspace" block in Simulink. Now I am trying to access the indivdual elements of that array and send them serially to F28379D microcontroller from Texas Instruments, which will multiply them with a gain and send them back for viewing on a scope.

Problem

I can't access the individual elements of the row vector in such a way that individual elements are available for sending through a serial port.

Here's what I've tried:

Attempts

Using a For Iterator to generate the index number, I tried to access the vector element at that index and send it to the serial port.

The data vector is defined as x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

It gives following error:

'SimpleVectorRead/For Iterator Subsystem/Serial Configuration' has sample time 0. Only constant (inf) or inherited (-1) sample times are allowed in iterator subsystem 'SimpleVectorRead/For Iterator Subsystem'.

But the problem is that the Serial Configuration block doesn't have sample time to set.

I tried the lookup table approach with the same serial configuration block (not shown here).

And I got the following error:

Error evaluating registered method 'Start' of MATLAB S-Function 'sserialsb' in 'MatFileReadWrite_SerialCom_HostModel/Serial Send1'.

Caused by:

• The block 'Serial Send1' cannot be assigned a continuous sample time.

Main issues

1. Can't access the individual elements of a vector from workspace
2. Can't set the sampling time for succesful serial transmission