Security features in Windows operating systems (especially since Windows 10), and virus protection applications in general, can sometimes interfere with installing or launching ExtendSim files. Security issues most often occur because:

The ExtendSim installer installs DLLs that need to be registered in the Windows Registry during installation. If the Windows operating system or your security software restricts this:

You’ll get a ComponentTransferData or Codebase failed to register error as the installer tries to register the DLLs.

If that doesn’t happen, you might get a _RightClickConnect database is missing message when ExtendSim launches and tries to open the Getting Started model, indicating that a required DLL is missing.

The ExtendSim application has an integrated compiler, so it creates and executes compiled code from the DATA segments of memory when it runs. In trying to protect your device:

Windows Data Execution Prevention (DEP) could cause ExtendSim to fail on launch and report an Unknown msg error or fail when placing a block in a new model and give an Unknown block message.

Some security systems could incorrectly identify ExtendSim as potential malware and stop it from launching or running, even though ExtendSim is digitally signed.

For a Floating License:

The installer for the License Manager not only creates the Service but tries to start it running automatically. Security systems will sometimes block the service from starting.

For automatic activation of the License Manager, encrypted data must be exchanged through port 80 over the internet. Security systems sometimes block that communication, so you must do a manual activation.

The ISV port must be unblocked or you will get a Connection refused at Server message when you launch ExtendSim.


If you are having security problems installing or launching:

Be sure you have the correct permissions. If possible, right-click the installer or the ExtendSim application and choose Run as Administrator. Or contact your IT or Admin to install or launch with permission.

Temporarily disable your virus protection software while installing ExtendSim or activating a Floating License’s License Manager. Note that for Windows 10, Windows Defender acts as an anti-virus system as discussed below.

If the ISV port for a Floating license is blocked, either unblock the port or use a different port for the ISV Server, as discussed in License Manager on Server FAQs.

See the Data Execution Prevention (DEP) instructions below if ExtendSim fails on launch or upon block placement.