Closing USB port

VCL TMS Async
1

Hi,

I opened a USB comm port with the Open function that returns without error. The USB port is not physically present but exist in the list of available ports. When I close the port with Close() the function hangs and does not return.



Version 1.5.0



Some Suggestion?

2

Is the virtual COM port driver up-to-date for this USB port?

Do you perform some other action immediately after the Close() that could cause the real problem?
3

Yes, the driver is the latest available from vendor

This is the only code I execute in OnClose event of the Form



          TIM_test->Enabled= false;

          if( COM_scanner->Active())

                COM_scanner->Close();

          for( int i=0; i < this->ComponentCount; i++ )

               if( this->Components->ClassNameIs( "TUniQuery") )

                    ((TUniQuery*)this->Components)->Close();

          DM_t1cont->Q_batterie->Close();

4

Ok,

the problem is on a network port not USB, sorry for my mistake.

After some test it seems the port is opened from 2 applications (on 2 different pc) without error but the Close function fail probably for driver problem



Mirco