Running Windows PowerShell during test execution

Here's an example,

function PSTest()
{
    var oShell = getActiveXObject("WScript.Shell");
    var oExec = oShell.Exec("powershell -Command \"C:\\Temp\\HelloWorld.ps1\"");
    oExec.StdIn.Close(); // Close standard input before reading output

    // Get PowerShell output
    var strOutput = oExec.StdOut.ReadAll();
    // Trim leading and trailing empty lines
    strOutput = aqString.Trim(strOutput, aqString.stAll);

    // Post PowerShell output to the test log line by line
    aqString.ListSeparator = "\r\n";
    for (var i = 0; i < aqString.GetListLength(strOutput); i++)
    {
        Log.Message(aqString.GetListItem(strOutput, i));
    }
}

HelloWorld.ps1 contains just

Write-Host "Hello World"

Ensure your path is correct; use double backslash, and enclose the full path in quotes

What is your function supposed to do?

it is supposed to run the powershell script that it's path specified by the variable "powerShellScript"

And the outline for this function is copied from the documentation 

https://support.smartbear.com/testcomplete/docs/testing-with/advanced/using-external-functions/running-powershell-scripts.html

When I'm running the function (the one I posted) in a separate script, it works fine. 

but when I run it during the excution of the whole test, it works but does not show any effect in the required task.

I'm using the latest version of TestComplete, and the output log shows,

You can also try this,

function PSTest()
{
    var oExec = WshShell.Exec("powershell -Command \"C:\\Temp\\HelloWorld.ps1\"");
    while (oExec.Status == 0) {
        aqUtils.Delay(1000);
    }
    while (!oExec.StdOut.AtEndOfStream) {
        Log.Message(oExec.StdOut.ReadLine());
    }
}

Does POST_REQ.PS1 produce any output when running the script via PowerShell command?

Can you insert Log.Message(oExec) beneath the line, var oExec = oShell.Exec(`powershell -file ${powerShellScript}`);

What is the output?