Releasing a license using Viewrpt.asp

Question

I am using Crystal Report Server XI and have written a small .asp app.
This app creates a SessionManager, get's an EnterpriseSession and generates a logontoken.
This logon token is used as the APSTOKEN in the viewrpt.asp URL string.
When viewrpt is accessed using this APSTOKEN, the CMC shows another session being used (as well as a license).
I have not found a way to release this licese once the webpage has been closed.
I have created FRAMESETs and used the ONUNLOAD event but no command I use will release the license.
I have tried some of the following:
Session.abandon
Session.Logoff
Response.Cookies("LogonToken") = ""
Nothing works.
The license is eventually released after 20 minutes.
Because users are also using InfoView, I cannot change the default timeout in web.config.
Any help would be appreciated.
Ray

Answer 1

There are two kinds of tokens - the failover token (the default token), and the WCA token.
When you use the failover token, it creates a new EnterpriseSession object that is independent of the original EnterpriseSession that created the token.  The original session will have no control over the session created by the token.
The WCA token does not create a distinct EnterpriseSession when it is used, but is tied to the original EnterpriseSession that created it.  When the original EnterpriseSession is terminated, any session created by the WCA token is terminated as well.
The 20 minutes lifetime suggests you're using the failover token, and that it's terminating only on HTTP Session timeout. 
Separate issue from the above is how to trigger a logout on the server when a client closes a web browser.  There's no consistent way to do so that works across all web browsers - the OnUnload was a common method used when a report was displayed in the Java Applet viewer or the ActiveX viewer - when the applet or ActiveX viewer was unloaded, a cleanup page can be triggered on the server.  However, this is problematic when using the DHTML viewer, since it's not a client component that's unloaded when report-viewing is done.
There is a 'trick' that works for Internet Explorer 6 that triggers a JavaScript when a window is closed - there's many descriptions of this method found by Googling - however, it's specific to IE 6.
Sincerely,
Ted Ueda