(Solved) ISTA+ Detects VIN but Connection Tab Closes Without Response

If you’re using ISTA+ for BMW diagnostics and experiencing an issue where the software detects your ICOM or ENET cable, successfully reads the vehicle’s VIN, but fails to establish a connection—don’t worry, you’re not alone. Many users encounter this frustrating problem, where the Setup connection tab closes without any error message or response. In some cases, a warning appears stating: “Protocol dispatch deactivated.”

This guide outlines the steps to resolve this issue and ensure your ISTA+ diagnostic setup functions smoothly.

Understanding the ISTA+ Connection Problem

This issue often presents as follows:

1. Interface Detected: ISTA+ recognizes your ICOM or ENET cable.
2. VIN Displayed: The vehicle’s VIN appears in the Connection Manager.
3. No Connection Setup: Clicking Setup connection closes the tab without further action.

Some users also encounter the warning: “Protocol dispatch deactivated.” Despite attempts like adjusting IP settings, disabling firewalls, or restarting the car and PC, the problem persists.

The Solution: Install VCRedist 2005-2019 x86/x64

The root cause of this issue is missing or outdated Microsoft Visual C++ Redistributable Packages, which are essential for ISTA+ to operate correctly.

Steps to Fix the Issue

1. Download the Required Package:
   • Obtain the VCRedist 2005-2019 x86/x64 package. You can find it here.
2. Install the Package:
   • Run the installer on the PC where ISTA+ is installed.
   • Follow the on-screen instructions to complete the installation.
3. Restart Your PC:
   • After installation, reboot your computer.
4. Reconnect and Test:
   • Connect your ICOM or ENET cable, turn on the vehicle ignition, and click Setup connection again.
   • The connection should now work without any issues.

Why This Solution Works

ISTA+ relies on Microsoft Visual C++ Redistributable Packages to perform critical functions, such as initializing communication protocols. Missing or outdated redistributables can prevent the software from properly dispatching protocols, leading to incomplete or unresponsive connections.

By installing the VCRedist 2005-2019 x86/x64 package, you equip ISTA+ with the runtime components it needs to function as designed, resolving the connection issue efficiently.

Follow these steps to get your diagnostic setup back on track and enjoy a seamless experience with ISTA+.