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NI MAX COM-Port Detection Issue

Hy,

 

I have an issue regarding NI MAX.

 

I am using a USB-to-Serial-Adapter on COM5 which is being detected fine by WIN10 (64-bit system) device manager. Somehow the device won't show up in NI MAX. If I manually change the COM-Port to for example "10" it will show up. If I swap the adapter for another one the same issue occurs.

I am using an identical adapter von COM3 which is working fine.

 

I tried the tool "Free unused COM-Ports" in MAX without any success.

 

Any ideas?

 

Tim

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