Vb.Net - Excel 2013 Invalid Index

Good Day Experts!

I am in a bit of a quandry here.  I have a VB.Net application with a TabControl that has multiple "Export to Excel" buttons on the Tabs.  It has worked fine for 2years on XP machines and recently Windows7 machines.  

However, we just upgraded a User to Office 2013 and now I am having trouble when trying to "Export to Excel".  Message received --> Invalid Index. (Exception from HRESULT:0x8002000B (DISP_E_BADINDEX)).  When I go to my machine which is Windows7 and Office 2010 I have no troubles.

Perhaps I need to create the objects a bit different for 2013 but I am not sure?

Do you have any ideas?

Thanks,
jimbo99999
Jimbo99999Asked:
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ChloesDadCommented:
We would need more information such as a stack trace to see the line of code that is causing the exception. and the source code at that point.
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Jimbo99999Author Commented:
Good Day Everyone!

I put some message boxes in the code by User so as to not disturb the other Users when I published.  I have narrowed it down to the line causing the error with the Office 2013 W7 machine and have bolded it below.  

Note, that this code works fine on my Office 2010 W7 machine.  

 oWB = oXL.Workbooks.Add
 oSheet = oWB.ActiveSheet
 If rbtnCashReceipts.Checked = True Then
          oSheet.Name = "Funding Report"
 Else
          oSheet.Name = "Pymt Release Report"
 End If
oSheet2 = oWB.Worksheets(2)
oSheet2.Name = "Check Details"
oSheet3 = oWB.Worksheets(3)
oSheet3.Name = "Invoice Details"

Is there a way to reference the worksheet that will work for both versions?

Thanks,
jimbo99999
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ChloesDadCommented:
The error is caused by there not being 3 worksheets in the spreadsheet. You could check using the Count property and then add the extra sheets if necessary.

NumberOfSheets = oWB.Count

IF NumberOfSheets >= 3 then
  oSheet2 = oWB.Worksheets(2)
ELSE
 oSheet2 = CType(oWB.Add(), Excel.Worksheet)
 NumberOfSheets =NumberOfSheets + 1
END IF

oSheet2.Name = "Check Details"

IF NumberOfSheets >= 4 then
  oSheet3 = oWB.Worksheets(3)
ELSE
 oSheet3 = CType(oWB.Add(), Excel.Worksheet)
 NumberOfSheets =NumberOfSheets + 1
END IF

oSheet3.Name = "Invoice Details"
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Jimbo99999Author Commented:
Good Day!

I apologize as I did not include my declaration block...here it is:

        Dim oXL As Excel.Application
        Dim oWB As Excel.Workbook
        Dim oSheet As Excel.Worksheet
        Dim oSheet2 As Excel.Worksheet
        Dim oSheet3 As Excel.Worksheet
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ChloesDadCommented:
Thats fine, but if there are not enough worksheets in the active workbook then you will get the error that you are seeing.

Just because you have sheets declared as objects doesn't mean that they are actually present in the workbook, they just exist as objects in the subroutine.

In excel you can set the number of sheets in the workbook that are created by default. This is probably what is different on the machine that has a problem.
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Jimbo99999Author Commented:
Hello ChloesDad:

Ahhh...I gotcha.  Ok, I will check that out today.

Thanks,
jimbo99999
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Jimbo99999Author Commented:
Thanks you...it is working now!!!
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