Reference number: CH000471

Incorrect Protocol version.

Issue:

Incorrect Protocol version

Cause:

This issue can be caused by any of the below reasons.

1. Protocol is not installed on the computer.
2. Program or game reporting the error does not have the same version.
3. Program or game reporting the error is running on a different OS.
4. Network card does not have the latest drivers.
5. Protocol is corrupt or bad.

Solution:

Protocol is not installed on the computer

Verify that the protocol is installed on the Computer. Additional information about verifying if a protocol is installed and how to install a protocol can be found on document CH000470.

Program reporting the error does not have the same version

Verify that the program you are using or game your are playing is the same version as the program or game you are attempting to connect to. If you are uncertain of the version, update to the latest version of code for that program or game.

This issue is very common on network games such as Quake 3, Half-Life, Wolfeinstein, Counter Strike, etc. Generally, an error such as Incorrect Protocol Version 66 or other number will be seen when the game is not running the most up-to-date version.

Program reporting the error is running on a different OS

It is common that new operating systems running the same game or code are not compatible. This issue can be often resolved by updating to the latest version of code for that program or game.

Network card does not have the latest drivers

Verify that your network card has the latest drivers. Drivers for network cards can be found on our network drivers page.

Protocol is corrupt or bad

If none of the above recommendations resolve your incorrect protocol version issue, attempt to reinstall the network protocol. Additional information about reinstalling and installing a network protocol can be found on document CH000470.