Error - 10 opening ComPort after closing

Hello.

I'm developing a device driver for the remote control of a power supply with Labwindows/CVI 8.5.1.

Communication with the device is through a virtual USB-ComPort.

Using the driver-dll in a test project shows that everything works correctly.

I can open the port, communicate with the device, and also the CVI CloseCom function will return no error.

But if I want to reopen the Compote after closing, OpenComConfig returns errorcode - 10 (Port in use).

I'm sure that the Port is no longer in use, because the Port can be opened by another application after closure.

in pseudo-code:

OpenComConfig(COM3,...) fine //works

CloseCom (COM3) fine //works

OpenComConfig(COM3,...) //returns error - 10

Thanks for the help!

concerning

Re - G

Problem solved.

It was my fault

I'm sorry.

Thread can be deleted

Re - G

Tags: NI Software

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