I have an issue with the gui_res.exe that is running in my task manger after starting it, but it is not giving me any display on my Windows desktop

This may be caused by Windows returning the incorrect monitor size values when closing the software.

Stop the GUI_res.exe from the task manager by right-clicking on it and selecting "End task"
Go to the installation folder where the CathexisVision software is installed.

Open the bsconfig.xml file in notepad or another editor.

Make sure the screen h (height) and w (Width) values are within this range:
0 to 2147483648

You can manually change the values to something that would represent your screen resolution.
See example below of expected values of a unit with two screens:

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