[RESOLVED] Excel VBA: Problem: Weird probem opening Workbook

Esteemed Forum Participants and Lurkers:
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Excel 2003 VBA

Several people submit workbooks to me, and I take the data from these books and use a macro to generate reports from them. One individual submitted the standard 2 workbooks, but for some reason, VBA generates an error when attempting to open the files - it executes the file not found abort:

Code:

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'SNIPPET ONLY!!!
Option Explicit

'GLOBAL Path for Department Files
Public gs_DeptPath As String
'GLOBAL Filename for STORES file
Public gs_DeptStoresFilename As String

Sub Macro1()
    Dim s_stores As String
    Dim s_regions As String
   
    'Initialize the filespec
    gs_DeptPath = "C:\TEST\"
    gs_DeptStoresFilename = "RawFruit_By_Store"
   
    'Hey, lets see if the files exist!
    s_stores = Dir(gs_DeptPath & gs_DeptStoresFilename & ".xls")
    If Len(s_stores) = 0 Then GoTo G_ABORT_NOSTOREFILE
   
    'Open the STORES file if it is not already open
    i = 0
    On Error Resume Next  'Ignore the error for "Not in Workbooks Collection"
        'If the STORES File is open, it is in the WorkBooks Collection
        i = Len(Workbooks(gs_DeptStoresFilename & ".xls").Name)
    If i = 0 Then
        ' Open the Stores file read-only
        On Error GoTo G_ABORT_OPENSTORES  'The file exists, but is not open and can't be opened.
        Workbooks.Open Filename:=gs_DeptPath & gs_DeptStoresFilename & ".xls", ReadOnly:=True  '<< ERROR IS HERE
       
    End If
    On Error GoTo 0  'Reset the Error Handler
    Exit Sub

'Error Handlers go HERE:
G_ABORT_NOSTOREFILE:
G_ABORT_OPENSTORES:  'This ABORT gets executed
End Sub

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All users are running Office/Excel 2003, but only this one user has a problem with the .xls files not being openable by VBA. The files open just fine without any kind of notification in Excel. I resolved the problem temporarily by renaming the original files, opening the files on my own desktop, and doing a Save As to the correct expected file name. After that, the VBA macro runs perfectly.

An ideas as to what could be preventing VBA from opening the files? Thank you for any and all comments, suggestions, and assistance.

Esteemed Forum Participants and Lurkers:
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I finally got this one resolved. The files that the various departments generate for me are 'exported' from a program called "MicroStrategies". In the User Preferences section, there is a check box parameter:

Export > Export documents to: > Export text data types as text

I have absolutely no idea what this means, but if this box is checked, the file looks totally normal to open it in excel, but the VBA Workbooks.Open method just doesn't work and generates an error. Of course the offending option was checked ... but thank goodness it was only on one user's machine, so it was obviously a machine configuration problem. I just unchecked the option, saved the preferences, and everything is working fine now.