Troubleshooting

The most common scenario when running thebcs.exe is a warning that other BCS processes are already running, like the image below.

If this screen appears, proceed with Step 1.

If it does not appear, skip ahead to Step 2, the BCS is likely running correctly, and Step 2 will confirm.

Click the Kill Processes button. When you are asked to confirm, choose to continue. If a warning appears saying that administrator privileges are required, it simply means the BCS needs permission to make changes.

To fix this, close the BCS completely. Then find thebcs.exe, right-click it, and choose Run As Administrator. Open it again and repeat the steps. This time the processes will be closed properly and the BCS should start up normally.

The video below shows each step.

Once the BCS is running correctly move to Step 3 to test the connectivity.

To ensure a clean installation, we must first verify that no BCS instances exist on your computer.

If the BCS has been installed previously there will be a folder called BCS in your Applications.

Click here for the steps to fully remove it before proceeding with this troubleshooting guide.

After you have done this, restart your computer.

• Click here to download the BCS. Even if you already have it installed, please download the latest version to ensure compatibility.
• A file named thebcs.exe will appear in your Downloads folder, as shown below.
• Double-click thebcs.exe to launch the BCS application. When running successfully, it should appear as shown in the image below.
• If a message appears indicating that BCS is already running, try restarting your computer before launching BCS again. If the same error occurs immediately after reboot, this indicates that BCS is still running as a service and was not properly uninstalled in step one above.
• If BCS launched successfully, you can then proceed to step three below.

• Click here to download the BCS. Even if you already have it installed, please download the latest version to ensure compatibility.
• A file named MacBCS.app.zip will appear in your Downloads folder, as shown below.
• Double-click MacBCS.app.zip to extract the BCS application.
• Double-click the extracted MacBCS application to launch it.
• A security dialog may appear asking if you're sure you want to open the file. This occurs because BCS is distributed outside of the App Store. The application is securely signed and notarized by Apple for your protection.
• Click Open to continue.
• The application interface should appear as shown in the image below.

If you have reached this step, the BCS application should already be running on your computer. If it is not running, the next step will not work.

Click here to run the BCS Connectivity Test. If everything is working correctly, you will see a green banner with a success message. After that, return to the original connection test you were asked to run, it should now work without any problems.

If you see a failure message instead, continue to Step 4 below.

Click here for DNS instructions.

Click here for DNS instructions.

If a proxy or VPN is in use it's important to ensure they allow BCS traffic.

This document goes into more detail on the ports and protocols the BCS uses to communicate.