Tom, thanks for the reply. i found the problem. in my VB code i was
opening a new application and not using the same one already opened.
(XLAPP = new excel.application) In this new XLAPP is where i would then
open the new file. (XLAPP.workbooks.open(File)).
For some reason, although the other application and source workbook
remained opened, it would not load the combo box's source data.
Now i just open the new file in the same application window and it
works just fine.
Thanks for your input.

Angelo


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