# Can't view my Registered .NET Assembly in NAV2009 R2

**URL:** <https://www.dynamicsuser.net/t/cant-view-my-registered-net-assembly-in-nav2009-r2/34434>\
**Category:** Developers Forum\
**Created:** [December 12, 2011, 1:55am UTC](https://www.dynamicsuser.net/t/cant-view-my-registered-net-assembly-in-nav2009-r2/34434 "2011-12-12T01:55:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tarek\_Demiati](https://avatars.discourse-cdn.com/v4/letter/t/f6c823/32.png) [@Tarek\_Demiati](https://www.dynamicsuser.net/u/Tarek_Demiati)\
**Post date:** [December 12, 2011, 1:55am UTC](https://www.dynamicsuser.net/t/cant-view-my-registered-net-assembly-in-nav2009-r2/34434/1 "2011-12-12T01:55:32Z")

</div>

I’m trying to experiment a bit with the .NET Assembly in NAV2009 R2,

So I did register a third party .NET Assembly with the syntax below,  
using CMD.EXE launched as Administrator :

C:\Windows\[Microsoft.NET](http://Microsoft.NET)\Framework\v4.0.30319\regasm.exe **C:\TEMP\Interop.MyEngine.dll** /registered /codebase

C:"\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools\gacutil.exe" /if **C:\TEMP\Interop.MyEngine.dll**

The assembly registered properly from the command line,  
however I can’t view it via NAV2009R2 when I declare  
a DataType of DotNet and lookup the various assembly available …

I’ve got the [frameworks.NET](http://frameworks.NET) 4.0 installed on my machine, and the component support it.

What else should I be checking ?