This happens if you try to use a Region AA (American) software on an AZ (Asian) radio. Ensure your software region matches the sticker on the back of the radio.

Usually caused by an incorrect COM Port selection in the CPS settings. Check "Device Manager" to see which port your USB cable is using.

If you are looking to get started, I can help you find the specific or explain how to set up MDC1200 signaling for your fleet. How to bypass the regional mismatch error ? How to update the firmware on your GM338?

The software is only half the battle. To connect your GM338 to your computer, you will need:

The following guide explores the realities of finding and using the Motorola GM338 programming software safely and effectively. Understanding the Motorola GM338 CPS