This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice This article is not considered official documentation for K2 software and is provided “as is” with no warranties.


The tree Icons are missing from the management page.



Users were unable to see any of the tree icons in the management page.


Registered the following controls via ControlUtil:

Open CMD and change the directory to:

CD C:\Program Files (x86)\K2 blackpearl\Bin

Then register the control

Controlutil register -assembly:"C:\Program Files (x86)\K2 blackpearl\Bin\ControlPack Controls\SourceCode.Forms.Controls.Web.ControlPack.Tree.dll"

If this doesn't resolve the issue then register the following as well:

Controlutil register -assembly:"C:\Program Files (x86)\K2 blackpearl\Bin\ControlPack Controls\SourceCode.Forms.Controls.Web.ControlPack.Common.dll"

Restart the BP service and perform an IISRESET.