Hello,

I have installed Arduino app v1.5.7, Visual Studio 2012 Update 4 and Visual Micro v1.1407.10.

When I try to Upload code to Arduino Micro in Arduino standalone app, everything works like charm.

When I try to upload code to Arduino Micro in Visual Studio, avrdude reports this error:
avrdude: ser_open(): can't set com-state for "\\.\COM7"
avrdude: Send: E [45] 
avrdude: ser_send(): write error: sorry no info avail

Arduino Micro is connected via virtual COM7.

What is wrong with Visual Micro?

Version of Windows is Win7 SP1 32bit.

By virtual COM7 I mean standard Arduino USB driver installed in system as COM port. My version "1.0.0.0" of this driver came from Arduino app installation, vendor is "Arduino LLC", driver date "4.1.2013".

I did a little research of the problem and found the following:
sometimes upload in Visual Studio does not work, sometimes it works.

When the upload in Visual Studio works, verbose messages from Visual Micro looks like this:

Uploading to I/O board using 'COM7'
Uploader started for board Arduino Micro
Uploader sometimes uses programmer name: avrispmkii
Upload method will be: bootloader
Uploading via Bootloader
C:\Program Files\Arduino\hardware\tools\avr\bin\avrdude "-CC:\Program Files\Arduino/hardware/tools/avr/etc/avrdude.conf" -v -v -v -v -patmega32u4 -cavr109 -PCOM6 -b57600 -D .hex:i"

avrdude: Version 6.0.1, compiled on Apr  3 2014 at 23:12:16
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "C:\Program Files\Arduino/hardware/tools/avr/etc/avrdude.conf"

         Using Port                    : COM6
         Using Programmer              : avr109
         Overriding Baud Rate          : 57600
         AVR Part                      : ATmega32U4
         Chip Erase delay              : 9000 us
         PAGEL                         : PD7
         BS2                           : PA0
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :
 

Note the COM port used on the command line for avrdude. COM6 is used here, which should be the right upload port. Verbose messages from Arduino standalone app looks alike.

When the upload in Visual Studio does not works, upload port for arduino board isn't detected correctly and messages from Visual Micro looks like this:

Uploading to I/O board using 'COM7'
Uploader started for board Arduino Micro
Uploader sometimes uses programmer name: avrispmkii
Upload method will be: bootloader
Uploading via Bootloader
C:\Program Files\Arduino\hardware\tools\avr\bin\avrdude "-CC:\Program Files\Arduino/hardware/tools/avr/etc/avrdude.conf" -v -v -v -v -patmega32u4 -cavr109 -PCOM7 -b57600 -D .hex:i"

avrdude: Version 6.0.1, compiled on Apr  3 2014 at 23:12:16
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "C:\Program Files\Arduino/hardware/tools/avr/etc/avrdude.conf"

         Using Port                    : COM7
         Using Programmer              : avr109
         Overriding Baud Rate          : 57600
 

It seems as it sometimes did not wait for correct detection of upload port.

Right now I can't simulate broken upload. 

I did upload a ten times and each was successful. And COM6 always appears in device manager (COM7 contrary disappeared).

But what I remember is the difference in delay when verbose messages are printed to the output window.

When upload is broken, display between these two lines is no delay:

Uploading via Bootloader
C:\Program Files\Arduino\hardware\tools\avr\bin\avrdude "-CC:\Program Files\Arduino/hardware/tools/avr/etc/avrdude.conf" -v -v -v -v -patmega32u4 -cavr109 -PCOM6 -b57600 -D .hex:i"
 

When upload works correctly, there is about 2 seconds delay after message "Uploading via Bootloader" display.