VS Arduino - Upload Failures

Feb 24^th, 2026 at 7:39am (UTC)

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VS Arduino › Visual Micro › Visual Studio 2019, 2022, 2026 › Upload Failures

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Upload Failures (Read 3014 times)

Bob Jones Full Member Offline Posts: 210 Location: Bellingham, WA Joined: Dec 4^th, 2015	Upload Failures Dec 17^th, 2018 at 5:46am	Print Post
	I was merrily compiling along when, out of the blue my code stopped uploading. I changed USP ports several times, I tested with a different board. I tried a completely different program. I rebooted my computer. Same failure persists. If it isn't the board or my code, what could it be and how do I fix it? The build output is attached.
	« Last Edit: Dec 20^th, 2018 at 8:10pm by Tim@Visual Micro »
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Tim@Visual Micro Administrator Offline Posts: 12204 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Loader Failures Reply #1 - Dec 17^th, 2018 at 12:34pm	Print Post
	This is the command to upload. Your can try it from a .bat file or cmd prompt Code D:\Arduino\hardware\tools\avr\bin\avrdude "-CD:\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -patmega2560 -cwiring "-PCOM28" -b115200 -D anoBot.ino.hex:i" Check windows device manager to see which usb driver is installed.
	« Last Edit: Dec 17^th, 2018 at 12:34pm by Tim@Visual Micro »

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Bob Jones Full Member Offline Posts: 210 Location: Bellingham, WA Joined: Dec 4^th, 2015	Re: Loader Failures Reply #2 - Dec 17^th, 2018 at 2:00pm	Print Post
	Thanks, but when I run that command, here's what I get: Code C:\Users\rhjon>D:\Arduino\hardware\tools\avr\bin\avrdude "-CD:\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -patmega2560 -cwiring "-PCOM28" -b115200 -D anoBot.ino.hex:i" avrdude: Version 6.3-20171130 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "D:\Arduino\hardware\tools\avr/etc/avrdude.conf" Using Port : COM28 Using Programmer : wiring Overriding Baud Rate : 115200 avrdude: ser_open(): can't open device "\\.\COM28": Access is denied. avrdude: ser_drain(): read error: The handle is invalid. avrdude: ser_send(): write error: sorry no info avail avrdude: stk500_send(): failed to send command to serial port avrdude: ser_recv(): read error: The handle is invalid. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: ser_send(): write error: sorry no info avail avrdude: stk500_send(): failed to send command to serial port avrdude: ser_recv(): read error: The handle is invalid. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: ser_send(): write error: sorry no info avail avrdude: stk500_send(): failed to send command to serial port avrdude: ser_recv(): read error: The handle is invalid. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: ser_send(): write error: sorry no info avail avrdude: stk500_send(): failed to send command to serial port avrdude: ser_recv(): read error: The handle is invalid. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: ser_send(): write error: sorry no info avail avrdude: stk500_send(): failed to send command to serial port avrdude: ser_recv(): read error: The handle is invalid. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: ser_send(): write error: sorry no info avail avrdude: stk500_send(): failed to send command to serial port avrdude: ser_recv(): read error: The handle is invalid. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: stk500v2_getsync(): timeout communicating with programmer avrdude done. Thank you. C:\Users\rhjon> I checked Device Manager output and it lists Arduino Mega (COM28) and says "This device is working properly"


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Tim@Visual Micro Administrator Offline Posts: 12204 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Upload Failures Reply #3 - Dec 17^th, 2018 at 2:23pm	Print Post
	You are outside of Visual Micro when you run the command so can find help in more technical places for your toolchain. The access denied error you are getting normally suggests the port is open in a serial monitor. You should also check windows task manager to ensure the avrdude.exe process is not locked and hogging the port. It you see an avrdude process you should terminate it.
	« Last Edit: Dec 20^th, 2018 at 8:10pm by Tim@Visual Micro »

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