companyclose - error on calling the trigger

Hi

I am try to use the companyclose trigger (codeunit 1) to close Navision but when I call the trigger I get the error "The Date is not valid".

The error is being triggered because the var LogInDate (LogInEnd procedure) is not initialised.. I thought this variable gets initialised on user login and maintained throughout the session.

To call the trigger I init a variable called l_AppMan then invoked it by the code l_AppMan.CompanyClose;

Any help is appreciated

Thanks

Omar