Qt – How to capture and compare all object properties on a web page

1. take a look at the first if statement and particulary this line: If Trim(DataTable.Value("ExpectedValue")) = "". You are saying 'If ExpectedValue is empty And the object does not exist, then report an error' Is that really what you want or do you want to test the ExpectedValue on 'not empty': If Trim(DataTable.Value("ExpectedValue")) <> ""?

2. Concatenation in VBScript is done with a & sign and not with a +, This statement Browser("MyApp").Page("MyPage").WebElement("text:=" + DataTable.Value("ExpectedValue")).Exist will resolve to Browser("MyApp").Page("MyPage").WebElement(0).Exist, leading to unexpected results. Use "text:=" & DataTable.Value("ExpectedValue") instead.

3. QTP has some quirks, testing on .exist property on objects is one of them (I am speaking for QTP10 here). It sounds strange, but in some cases (unfortunately I can not remember which once, if I have a spare minut I'll try to reproduce it), .exist returns a False that is not recognized natively as False in a conditional statement. The best way to test if an object does not exist is explicitly test if the exist property equals false: If Browser("foo").Page("bar").WebElement("xizzy").exist = False then print "Object does not exist!).

4. tip: To speed up your test, you can use the exist with a timer, if you use .exist(0) it will test the existence of the object immediately with no use of the synchronization timers you have set in your testsettings.

Maybe this is not directly a solution to your exact problem, but it gives more reliable results and will eventually lead you to the solution. Testing if an object does not exist with the .Exist method is the correct way to do this. When you are getting errors there is something else wrong. For example the browser or the page does not exist.

This is an answer I wrote before, updated to your situation:

Can you see the BHOManager class in IE?

Go to IE > Tools > Manage Add-ons, make sure BHOManager class 
(Browser Helper Object) from Mercury Interative Corporation is 
enabled.   

It is recommended to disable other add-ons, such as third-party toolbar, add- ons from anti-virus companies, etc. This is to make sure nothing is preventing QTP from hooking into the browser.

If this is all the case, you re-register the BHOManager again:

Close IE and all iexplore.exe processes in the task manager
Close QTP (or restart your machine)
Go to Start > Run, unregister and register BHOManager.dll: 
    regsvr32 -u c:\WINDOWS\system32\BHOManager.dll 
    regsvr32 c:\WINDOWS\system32\BHOManager.dll 

When this solves your second run, you know there is something wrong with the BHO in IE: They are not started correctly or they are refused the second time. Maybe a more strict IT policy or an eager virus scanner that removes all not recognized browser add ins.