To run the ForNAV reports, you must have the ForNAV DLL on your NAV service tier. The service tier is the machine that runs the NAV server process that users connect to.
On a service tier machine, the NAV service is typically installed in your program files folder. The add-in folder is a subdirectory to the service folder. The following is an example of the add-in folder for a NAV 2018 service tier on an English version of Windows:
C:\Program Files\Microsoft Dynamics NAV\110\Service\Add-ins
The ForNAV installation program can automatically install the ForNAV add-in DLL to this folder. However, this only works if your service tier is installed under the default folder. If you have changed the installation path of the service tier, then you must copy the add-in to the correct folder yourself.
Maybe you have multiple installations of the service tier files on your machine and you don’t know where it is running from? In this case, you can use a simple trick to get the Windows Task Manager to show you the location.
In the Task Manager, on the Details tab, add the Command line column showing the command line for each running process. Find your server process and then you can see the location from the command line.
Simply copy the ForNAV DLL to this folder. The version number should be part of the folder name. This helps the service tier if you have multiple versions of ForNAV on the same server. When the server automatically deploys the DLL to the client, it deploys all the files in the same folder as the DLL. If you had multiple DLLs in the same folder, it copies all the DLLs, even if you only need one specific version on the client.
You can find the DLL on your development machine under C:\Program Files\Reports ForNAV\Add-ins\ReportsForNAV.