I'd guess that it was a finger/mouse-click timing issue.

I did File|open
selected the file
and shift-clicked on the open button (and continued to hold that shift key down)

And both the Auto_open and workbook_open procedures were not run.

David P. wrote:

I have a macro that runs upon opening a file. I believe that holding down the
shift key is supposed to disable automatic macros. It is not disabling. Any
suggestions?
--
David P.

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Dave Peterson