I'm using Visual Studio 2015 and my project uses ReportViewer, however when I export my application to be installed on my client's computer it informs me this message:
I've tried all day on the internet about this problem, I tried to access the folder where it contains this DLL, but I can not find it until I tried CMD-DOS, but I can not find my DLL, / p>
Install the available Runtime for download at link
But connect to the correct version to install.
I solved the problem so I installed the dll on the client machine and solved my problem.
I was able to access the folder GAC_MSIL giving WINDOWS + R AND PLACING THE DIRECTORY:
C:\Windows\Assembly\GAC_MSIL
So I copied the machine's version 12 from the client.