Solution
1. Open the Window Task Manger to check the Process list, manual close the related process about S2VNA.exe

2. Reopen the CMT driver again , you could see the normal status as below

Click the button "Run" to open the measurement window as below:

3. Re-try to run the LV code , you will see the result was OK.

The measurement result was same as the result of CMT software.