I've written a Powershell script to automate a Web UI test using IE. The script runs fine when I execute it from PowerShell. However, I have run into an obscure problem and that is when I run my Web UI test script from another powershell script, it fails. I tried to debug it and found that it fails on the following line.
$button = $ie.Document.getElementsByTagName("button")
$button.Item().Click() # $button.Item() evaluates to null when the script is executed from another script.
Can anyone help me figure this out? It appears that when I run the script, the script has no issues locating the element, but when it is run from another script the element I am looking for cannot be located.
EDIT I get the same error when I run the PS script through Task Scheduler. The script only works when I invoke it directly. If I invoke via another script/program, it doesn't work.