Add-in exception error

Overview

You are getting an Add-in Exception error:

Retrieving the COM class factory for component with CLSID 
{60E40C78-A3F8-11D4-9758-0050BAABB975D} failed due to the following 
error: 80040154 Class not registered (Exception from HRESULT:
0x80040154 (REGDB_E_CLASSNOTREG))

You tried uninstalling and reinstalled all add-ins and made sure they were enabled under Utilities. Rebooted the PC several times, but the error is still happening.

Solution

The issue is appearing because the library is part of the application server component. To fix the problem please follow these steps below:

If you are installing from a .exe file, please make sure that you install both the server and the client application as administrator, by right-clicking on the installer and choosing Run as Administrator. Please note that this option is not available for .msi packages.
Copy the EverestBrowser.dll file from the server, which is located in:
```
C:\Program Files (x86)\Icode\Everest\Application
```
to the client workstation. Use the same directory structure as above
eg. C:\Program Files (x86)\Icode\Everest\Application
Open the DCOMCNFG application, by going to Start > Run and type dcomcnfg.
Expand the Component Service down to COM+ Applications, right-click on the COM+ Applications and choose New > Application:
Follow the wizard to Create an empty application:
Enter the name of the application, and select the Library application as the Activation Type:
Once created, expand the newly created component, right-click on the Components folder, and choose New > Component:
Follow the wizard for the new component creation by selecting Install new component(s):
Once the wizard is followed, click on the Add button as shown below. You will be asked to select a DLL library. Select the library that copied from the server in Step 2:
Click Next and Finish the wizard. The component should be correctly installed: