Inserting Excel range into Word bookmark of existing document

[gyz]

Hello, I have a MS word template populated with various bookmarks. At one bookmark, I want to use the insertfile method to insert a table (or rather, a range) from a worksheet of an existing workbook.
the code I have here gives a runtime error 9 - subscript out of range.

Set oWord = CreateObject(class:="word.application")
oWord.Visible = True
oWord.Activate
Set oDoc = oWord.documents.Open("C:\Examtemp.dotx")

with oDoc
    .bookmarks("Example").range.text = "some text here"
    .bookmarks("Table").Range.Content.InsertFile ThisWorkbook.Path & "\temp.xlsx", Sheets("Results Table").Range("A1:E" & LastRow) '**This line gives runtime error 9'
    .bookmarks("Table").Range.Content.InsertFile ThisWorkbook.Path & "\temp.xlsx", "Sheet3!A1:E" & LastRow '**This line gives runtime error 438 - object doesn't support this property or method
    [more bookmark insertions]
End with

The paths, names and ranges are valid and correct, which makes me think I'm using the insertfile command incorrectly. I've tried looking for examples of what I want to do but most appear to involve inserting a file into a new blank document. Could anyone help with whether I am using the command correctly?
In anticipation of the question "why not just use copy and paste at the bookmark", the problem with that is that I have very particular number formatting in the cells which is lost when using this method (believe me, i've tried everything to retain it and nothing works). Thanks in anticipation.