Thanks for the reply.
Put pictures of your project.
It seems everything is correct, but the error is.
In what could be the problem?

So, all your assemblies are the same version? Could you check your project and make sure all IG references are the same version (the ones referenced in your project)?

Could you try cleaning the project and deleting everything in "Bin" and "obj" folders of the project? Some old assembly version might be cached there and picked-up by the project instead of the correct one.

You can check the version of each IG assembly in the "Properties" window of VS (see the attached screenshot). Unless they're all version 2266, you'll get this compiliation error.

Thanks for the reply.

Version of dll 11.1.20111.2266.
Product repeatedly reset.

The problem occurs only InfragisticsSL4.Controls.Menus.XamRibbon.v11.1 Version = 11.1.20111.2266 in Windows 7 Pro x86.
Releases in 2184, 2216 working correctly.

On Windows XP, Windows Server 2008 2266 is also working correctly.

What else can I do?

Can assemble and attach the assembly InfragisticsSL4.Controls.Menus.XamRibbon.v11.1?

Thanks for the reply.

I'm not sure what's the issue you're facing - probably something went wrong during the patch process and this assembly was not properly updated.

Could you check the version of all assemblies in product's Bin folder and see if only the Ribbon one is incorrect? The easiest way to do that is to open the Bin folder in Windows Explorer and select "Tiles" view. In this view you can see the build number of the assemblies right below their names.

If the ribbon assembly is not updated properly and its version is different than the rest of assemblies, my assumption is that something went wrong during patching process. The safest way to deal with such issue would be to uninstall the product entirely from add/remove programs and then install again and apply the latest patch.

Best Regards,