Tim,   Thanks for the information.  I had tried A and C, but not B and E.  D does not apply in this case, but the information is good to have anyway.  I have added all that information to my notes.   I think that my previous troubleshooting efforts were on the wrong track, and that I ended up making the issue worse, so I elected the remove and reinstall all the SAS components, just to get back to a clean slate.  The SAS tab is now back and everything seems to be running fine.  If the problem returns, like it did before, I will have more of an idea of what to look at, and will definitely try all the things that you mention before doing anything else.   For now, we can consider this one closed.  I'd like to thank everyone who contributed information to this discussion.  I have learned a lot!   --Tom ... View more

Casey,   Thanks.  I came across the Switcher utility while doing some reading this morning in the support forums.  I did give it a try, but it did not make the add-in reappear.  That said, I did not know about it re-registering the add-in, so that is helpful information.  I have added the Switcher utility to my ever growing SAS notes file for help with future troubleshooting.   And thanks for the link to Tim Beese.  I will add that page to my list of resources.   --Tom ... View more

I have a theory based on my reading of other posts with the same issue.  I think the reason that I cannot get the SAS add-in to load is that it was disabled.  Initially, I did not realize the difference between disabled add-ins and those that just are not loaded.  So I was going to the COM add-ins to try to load the SAS add-in, and I suspect it was not loading because it was disabled.   Unfortunately, before coming to that realization, I managed to make things worse.  Now the SAS add-in does not appear at all in the list of COM add-ins.  I think that I will reinstall SAS in order to get it back, and then if the issue persists I will verify whether or not the add-in is disabled before I try to load it.   I will post an update once I have more information.   --Tom ... View more

Thanks for the reply.   The link that you posted seems to be an old article as my version of Excel does not have a Tools menu.  However, if I go to File > Options > Add-ins, I can see that there are no disabled application add-ins.  If I drop down the Manage box and go to COM Add-ins, the SAS Add-in 7.1 for Microsoft Office checkbox is cleared.  Unfortunately, if I check that box and click the OK button, it does nothing.  The add-in will not re-enable.  This is what I meant in my original post.  Sorry if that was not clear.   Thus far, the only way I have been able to re-enable the add-in is to do a full reinstall of Office.  That was okay the first time, since I thought it might just be a one-off situation.  But now that the problem has recurred for the same user on the same machine, obviously doing repeated reinstalls of Office is not going to cut it.   --Tom ... View more