Applies To:
  • CitectSCADA


Citect is experiencing very slow startup on certain machines. Runtime manager can take up to 90 seconds to be displayed. Then there might be additional delay before displaying graphic pages.

Same problem can be seen for Environment Manager, it can take up to 45 seconds to show up.

This issue could be related to way that the operating system is checking certificates.

To Workaround this issue you'll have to turn off "Check publisher's certificate revocation" in internet options:

Microsoft recommends disabling CRL Checking by changing a setting in Internet Explorer. Use the following steps to disable the CRL checking in Internet Explorer:
  1. Select Start> Control Panel.
  2. Double-click  Internet Options.
  3. Select Advanced tab.
  4. In the Security section. uncheck the  Check for Publisher's certificate revocation option.
By disabling the CRL checking using the Internet Options, you are not exposing yourself to a security threat because this check is not working. The reason why this problem occurs is because your network settings are not allowing Windows to access the CRL.

In addition, it is possible to programmatically set the CRL verification. When the Check for publisher's certificate revocation is unchecked, a setting in the registry is changed. To turn off CRL verification, set HKCU\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing\State  from 0x00023c00 to 0x00023e00. To turn CRL Checking on again, reset the State key to 0x00023c00.


 Slow startup, Verisign, Security