Internet Explorer crashes while iterating through element collections

[jbnv]

I am using AutoIt and IE to scrape data from a small quantity of disparate websites. I have at least two different routines that are causing IE to crash and disrupt the extraction. I have identified that in both cases, IE crashes on the first "Next" statement that it encounters. Is this something that can be worked around? The project may be dead in the water if I can't find a way to get this data without IE crashing. 

One of the functions looks like this:

Func HTMLToExcel()
    Local $cAgentSpans = $oIE.document.querySelectorAll("span.menu")
    For $oAgentSpan In $cAgentSpans
        ...
        Local $cContractTables = $oAgentSpan.querySelectorAll("table")
        For $oContractTable In $cContractTables
            ...
        Next
    Next
EndFunc

And the other function looks like this:

Func HTMLToExcel()
    Local $tableCollection = $oIE.document.querySelectorAll("form > table")
    Local $tableIndex
    For $tableIndex = 3 to $tableCollection.length
        Local $table = $tableCollection.item($tableIndex)
        For $oTr In $table.querySelectorAll("tr")
            ...
        Next
    Next
EndFunc