Hi @ysato, apologies but we are having troubles here understanding why it is not working for you and we cannot reproduce the error here.
The .Net assemblies referenced in Tobii Core SDK (Tobii.Interaction.Net.dll and Tobii.Interaction.Model.dll) are compiled with an AnyCPU config, so they shouldn’t pose a problem.
Also, Tobii.EyeX.Client.dll is being correctly created and is different for each architecture. (as you can see the file size difference)
Maybe you can try to copy the correct native dll to the output folder? Was there a chance to test on another computer?