User have encountered an error during browsing through our 16.7 installation. The error is 'The current call sequence (2) does follow the last sequence (0). All calls from the same series must appear in sequential order.' The call sequence increases every time that we refresh our web site. While examine the log file of the website, it seems that the error occurs on the following "Url=/Ebbot/PlugIns/Core/Navigation/Navigators.aspx".
This error pops up randomly while browsing through the website(especially if we click the Home button) and keeps increasing the call sequence number .
Work Around :
Restart the IIS or create a new session in IE
NOTE: Bug has been reported for this issue #905120 for environment 16.7