Connect STM32 via USB using virtual COM port

Hello Everyone!

I am trying to connect a STM32F401 via USB. Using other terminals the communication works fine. Now i want to implement it in LABVIEW 2017.

I started with installing the device driver from the ST for Virtual COM Port

In the device manager everything seems to work fine. But there is a problem accesing the device using MAX or VISA.

It is not possible to open VISA Testpanel. Error Code reads as follows

Error opening resource:
ASRL5::INSTR

VISA: (Hex 0xBFFF0000) unknown systemerror (several errors).

Using the VISA driver wizard i got the message that the drivers are already installed porperly.

Using WIN10 64 bit

Labview 2017 32 bit

MAX 17.0

Any suggestions on how to continue? Can it be possible to acces the port in LABVIEW without having a proper VISA setup?

Thankful for any suggestion, Gu