HELP!! Blank User Name appearing in log

[heidii]

Hello Everyone:

I have interesting scenario that I need help with. I have a split
secured multiuser database. My database front end is stored on a
server in a shared folder. My users access this folder through citrix
when logging into the database.

I also use Total Access Admin to watch who is in and out of the
database or if I need to boot users, and in my database I record who
logs in and out. Here is my diliema. For about the last month or so
I have noticed on my user lists on Total Access Admin that I would get
a blank username line logged into the database. So I pulled my
UserLog files from my database, and sure enough there are Logouts from
an unnamed blank username recorded. They do not have log in times
though. Just Log out times. I have checked my security file and
there is no blank username listed to use. I have tried logging with a
blank username and it does not work. What could possibly be causing
the entry of this blank username in and out of my database. Does it
have anything to do with Citrix or could it possibly be a person
finding a way to log in this way?

Any help appreciated.