Copy data block from one workbook to another .. should be easy

I am clearly missing something when it comes to ranges, copying and workbooks ... cannot seem to make this work. Simple task to copy a block of data from one spreadsheet to another. Any ideas?

'------------------------------------------------------------------------------
Private Sub mjsLoadOrigData()
'------------------------------------------------------------------------------
Dim RootFolder As String 'Where we start looking for the file
Dim FileChoice As Integer 'Which file was chosen
Dim FullName As String 'Full name of the file
Dim RangeText As String

Dim XLapp As Excel.Application 'Need a new instance of Excel
Dim SrcBook As Excel.Workbook 'This will be the Quote Workbook object
Dim ThisBook As Excel.Workbook 'This Rev Rec spreadsheet


RootFolder = "C:\Users\Admin\Desktop"
Set ThisBook = ThisWorkbook


On Error GoTo CLEANUP2
'------------------------------------------------
'Open the file to copy data from
'------------------------------------------------
Set XLapp = New Excel.Application
XLapp.Visible = True
XLapp.FileDialog(msoFileDialogOpen).InitialFileName = RootFolder
FileChoice = XLapp.FileDialog(msoFileDialogOpen).Show

If FileChoice = 0 Then GoTo CLEANUP2

FullName = XLapp.FileDialog(msoFileDialogOpen).SelectedItems(1)
Set SrcBook = XLapp.Workbooks.Open(FullName)


On Error GoTo 0
'---------------------------------------------
'work out the range and paste the data
'---------------------------------------------

RangeText = SrcBook.Worksheets("Original Data").Range("A1").End(xlDown).End(xlToRight).Address
RangeText = "A1:" & Replace(RangeText, "$", "", 1)

SrcBook.Worksheets("Original Data").Range(RangeText).Copy _
Destination:=ThisBook.Worksheets("Data").Range(RangeText)


CLEANUP2:
'------------------------------------------------
'lets close the file and release memory etc..
'------------------------------------------------
On Error Resume Next
SrcBook.Close savechanges:=False
XLapp.Quit
Set XLapp = Nothing
Set SrcBook = Nothing
On Error GoTo 0
End Sub

I should have said this fails at the copy stage as follows

I don't think you need to create another instance of Excel (esp. since you can't copy between them)

Just have your macro open the other workbook, copy the data, and then save and close the second one

Many Thanks Paul, removing the new instance of excel solvedmy problem.

Stupid mistake and I was clearly looking in the wrong area.
Really appreciate you taking the time to point this out,

again thanks! Mike.