USB Virtual Com Port failures with Windows 7 64bit

greg239955 · ‎2012-06-17

Posted on June 17, 2012 at 19:34

I have an AIS650 connected with USB to PC running Windows 7 64bit. The STMicroelectronics VCP driver (v1.3.1) is loaded. The COM port keeps dropping out.

Sometimes the following error appears:

Activation context generation failed for ''C:\Program Files (x86)\STMicroelectronics\Software\Virtual COM Port Driver\dpinst_ia64.exe''. Dependent Assembly Microsoft.Windows.Common-Controls,language=''&&sharpx2a;'',processorArchitecture=''ia64'',publicKeyToken=''6595b64144ccf1df'',type=''win32'',version=''6.0.0.0'' could not be found. Please use sxstrace.exe for detailed diagnosis.

The software that is trying to use the COM port fails

The port 'COM6' does not exist.

System.IO.IOException: The port 'COM6' does not exist.

at MaxSea.IO.Ports.Internal.ThreadedPhysicalPort.Write(Byte[] buffer, Int32 count)

at lx.b().

This failure is a critical part of Navigation software and I need to find a solution to this issue. I would be grateful for any assistance.

#stm32-vcp

tsuneo · ‎2012-06-17

Posted on June 17, 2012 at 22:33

Does your PC mount Itanium processor (IA-64)?

In the error message, dpinst_ia64.exe is referred, which is the driver installation utility for thie processor.

As of 64bit PC, x64(-86) is more popular than IA-64.

Tsuneo