We have installed Pervasive 8.6 on our servers (DB and Meteframe client). Since the installation last week, we have had to at least restart the Pervasive engines twice. It seems that every couple of days, the engines are not running or ntbdsmgr.exe has grabbed all the available memory. Not really sure. What happens is that if you have a session going you are fine. You can't start another session nor can any more users access the application. There are no error messages and there are no changes to the pvsw.log file eithere. I am at this point open to suggestion. We have the Pervasive product installed on all of our networks and up until this time have never had a problem with it.