My OE is periodically shutting down due to this error. This happened to me a
few years ago, and when I fixed it, I also lost everything in all files. I
also lost everything in my "inbox" last week after I rebooted. I went to the
MS help page after googling "msimn error" and found what I think is a fix,
but discovered something else. I wanted to see whether my files were "read
only" so I followed the instructions by searching for the dbx files. When I
found these, I right clicked on [inbox] and then clicked on properties. The
"archive" box was checked at the bottom and it said the file size was 720MB.
I have very few messages in my "inbox" and know that the files in there are
no where near this size. It seems that it contains every email I have ever
received. I'm thinking that is where the "archive" issue might come into
play. How do you access these emails if they have been archived?? Should I
have the "read only" box checked?? There is also an [inbox1] in there right
below the other [inbox] that has 360MB of memory being used. I tried double
clicking on these two and a box appeared asking me what program did I want to
use to open these up. I have no idea. I'm thinking that the size of these
two files is giving me the problems and would like to delete what is in there.

Any help would be much appreciated. TIA