Can't close open hidden workbook (1 Viewer)

I using Access 2010 (Enterprise) on Windows 7 Enterprise PC. In the course of executing VBA code, I open an Excel workbook in Access using

In making changes to the Access program, it occasionally crashes and I close the above wKb. Sometimes, on a crash, I manually close the wKb.

My issue is when I don't have to opportunity to close the subject wKb, manually or programmically, AND on opening a new instance of the Access program I am unable to open the subject workbook file for changes; the wKb is hidden and is open. I can't close the wKb programmatically. I can't "see" the wKb when "checking" open workbooks. To presently cure the problem, I have to re-boot.

Question: How can I close the "hidden & open" wKb, without saving the changes, which I cannot "see" in Access. :banghead:

Of course, fix all program errors so that it doesn't crash.

Thank you in advance for your insight and suggestions.

use the excel application object to open the workbook.
instead of:

Set wKb = Workbooks.Open(FileName:=sNewxlsx, ReadOnly:=False)

use:

Set wKb = xlApp.Workbooks.Open(FileName:=sNewxlsx, ReadOnly:=False)

when your done with the workbook, close without saving.

wKb.Close False
set wKb = Nothing

Thank you, I'll give you suggestion a try.