Bob,

>I have introduced into the ABusinessObject.cs class a line to get the application's current user by using the following line:
>
>

>string userId = mmAppBase.UserMgr.UserID;
>

>
>However, when I am running the application and encountering this line the value is always null. I debug-ed the method and see an exception is thrown on the UserMgr AuthenticateUserCmd method and I also see that a message shows "A database key must be specified".
>
>Not sure if this message means anything, but does anybody know why the UserMgr function is not returning the userID of the currently logged on MM user in the application? I am using MM 3.6 and I have added the MM security tables into the same database for the application.

Can you post the full stack trace for the exception?

Thanks!