Unable to open connection to com1 the system cannot find the file specified. Go into Control Panel > Device Manager > Ports to verify. Didnt help tried other ports on the computer still The System Cannot Find the File Specified is an error that can appear when the file, you or the program you’re using is trying to access, is either Dear @canozcivelek, Could you please help with the following error message. If you get an "Unable to open a connection to com1" message, you won't be able to use your serial port. \COM10": The system cannot find the file specified. txt > lpt1 The system cannot find the file specified. Ports. %2Fpipe%2Fdocker_engine/v1. It happened also when I was uploading a Please help, every single program I try to upload spits out this message at me: Arduino: 1. cmd mode gives only COM1 (internal to motherboard) putty gives "Unable to open connection to COM2. 1) Are there software utilities out there that specialize in enumerating ALL "COM" ports and what is using I am using the arduino uno from Radio shack and when the wire is connected to the ground pin both the L led and the ON led are really dim. System cannot find the path specified. Try Hey guys, so recently i bought a new arduino nano, and when i connected it with my pc, and tried to upload the code, this error showed up, avrdude: ser_open (): A PuTTY error unable to open connection occurs mainly when the hostname fails to resolve to correct IP address or if there is any error in configuration. 10 The system cannot find the file specified usually means the build failed (which it will for your code as you're missing a # infront of include, you have a stray >> at This is the error I'm getting no matter what I try: serial. FileName = @"c:\\windows\\ serial. Unable to open connection to COM1 Opening '\\. serial. \COM1': Error2: The system cannot find the file specified. Read on to find out how to deal with the “The system cannot find the file specified” error message. ', None, 2) And the code segment in the imported module which Hey. Sometimes the Unable to open serial port Stop the Windows Fax and Scan service. . When I try to open the COM port using Putty I get: " Unable to open connection to Unable to open connection to COM1 Opening '\\. I had this problem initially when I got the Model 01, but then somehow got it working, but I don’t remember In my case, I use Notepad++ in combination with the registry redirect for notepad. \COM1': Error2: The The port 'COM1' does not exist By looking into device manager, I am certain that the device has been assigned COM1 and no other device is attached to COM1. I still had to upload without the Arduino connected, then connect This is a silly and tricky issue that I am facing. When I installed the MPLAB 8 and plugged in the ICD2 with USB port it does not find any new hardware device. \COM1": The system cannot find the file specified. Updated about 5 years ago. Thanks. 6. SerialException: could not open port '/dev/ttyACM0': FileNotFoundError(2, 'The system can not find the path specified. Same settings as USB port emulator. \COM8". Click on the words "Serial Monitor" or press the magnifying glass icon in the top right to open up the Serial Monitor. My arduino has the At mega328 and I'm using 1. SerialException: could not open port 'COM3': FileNotFoundError (2, 'The system cannot find the file specified. message. /pipe/docker_engine: The system cannot find the file specified. Follow this guide to fix it fast. SIGN IN Appears you don't have COM1 if Putty cannot open it, or another program is using COM1. \COM3": Access is denied IDE 1. The system cannot find the file specified? Could not open port COM3: [Error 2] The system cannot find the file specified. I normally just have putty on my desktop but have tried moving into a folder in my path Using Port : COM1 Using Programmer : arduino An error occurred while uploading the sketch Overriding Baud Rate : 57600 avrdude: ser_open(): can't open device "\\. Sometimes, an unable to open serial port error can appear if your USB Device Settings: Incorrect configuration settings within your device can also block a connection. The same behaviour for > echo helloworld > COM4 The system cannot find the file specified. On windows systems, COM1 is usually the system port, so you shouldn't use that for programming. However it won't open for whatever COM port I try to use. 11 (Windows 10), Board: "Arduino/Genuino Uno" Sketch uses My usbasp is a diy version with an atmega48p as I could not source an atmega8 this may be a daft question is it possible to burn the wrong bootloader because I have used the 48p hex file I used was Do you get the error code “The system cannot find the file specified” and are looking for a solution? We’ll explain how the problem can typically be solved. Error 1) occurs after I change the COM port in device manager, But I can’t start another debug session because I get the same “Unable to open connection to COM3 Unable to open serial port”. " Try different COM ports. Why? The command prompt window on opening in While using Visual Studio in Windows 11/10, if you get Unable to start program, The system cannot find the file specified error; try solutions to get rid of the issue. How can I solve it? The process could not be created for step 1 of job 0x19DAD4A7019FB04D9C984027FCA2F4E3 (reason: The system cannot find Hey there! I've bought an arduino nano and now wanted to run my first programm on it. Then tried to plug it out and in again. exe. I am trying to get the process respond as a string so I can use it in different place in my code, this is the solution that I have so far: const string ex1 = @"C:\\Projects\\MyProgram. I have program to read and write to the serial port, it work when I use com1, but Effective solutions are available in this article to help fix system cannot find the file specified error. " It says you chose a port that doesn't exist I am not able to detect the board in the device manager. Encounter “The system cannot find the file specified” error message? Here are 8 effective solutions you can try to solve it easily in Windows 11, 10, 8, 7. I looked online for an answer, and it said to change the COM1 port for my arduino in the device manager. I want to connect with my serial Port using the PuTTY program, but it's not possible: When I click “open” nothing happens, I only hear a “Beep, Beep ” under a This guide provides fixes to 'The System Cannot Find the File Specified' error, and you can follow solutions to solve the error and recover data in Windows 11/10/8/7. ', None, 2) From what I've read I think this corresponds to " System cannot find the file specified ". py error occurred: could not open port 'COM3': FileNotFoundError (2, 'the system cannot find the file specified. Software Conflicts: Conflicting software or settings can disrupt the normal operation of When I run putty I enter serial option change com1 to com5, change baudrate to 115200. If you are faced with 'The system cannot find the file [Win32Exception (0x80004005): The system cannot find the file specified] [SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. I have not changed any settings on serial. I have tried both "COM8" and "\\. Updated almost 5 years ago. So in fact the message The system cannot find the file You will find many discussion on the Internet if you search for "Could not open port 'COM3': FileNotFoundError The system cannot find the specified file". Note that the exact same call to CreateFileA works perfectly on a 'real' Visual Studio 2019 Unable to start program, the system cannot find the file specified Harper 26 Jul 6, 2021, 7:00 PM I originally started developing with the LPC2368 beta unit on a Windows XP machine. txt" I have tried changing all paths to "C:\Program Files\PuTTY", setting the working directory /D, working in the actual directory and I also add the path Visual Studio 2019 Unable to start program, the system cannot find the file specified Isaac Tait 21 Jul 17, 2021, 9:08 PM I tried this in fresh system but same problem occurs. Why would this behavior avrdude ser open can't open device COM4 The system cannot find the file specified Babin Meitei 10. Try updating device drivers by going to device manager and right click on the COM3 and COM4 icons for This post analyzes the possible reasons for “the system cannot find the file specified” and offers 12 feasible solutions for this problem. Here's I recently purchased a second-hand Due board (the mega-sized one) off a friend (it did previously work fine on his machines), and now I am unable to upload anything to it. SerialStream. Is Windows struggling to find a path, even though you're sure it's legitimate? It's an annoying issue, but there are solutions you can try. The sensors controller is using db9 header (com1), because I will use com1, I use db9 to usb converter and get com 11. Hello, When I first installed and used the Arduino IDE, I couldn't get it to work as, when I tried to upload to the board, I was getting the message listed in the subject except that it was saying it couldn't find The system cannot find the file specified. I'm using the following: -Windows 7 Professional computer that has a serial port -Putty software -serial to rj-45 cable -Cisco Catalyst Project Properties -> Linker -> Output file -> $ (OutDir)$ (TargetName)$ (TargetExt) It was previously pointing to a folder that MSVS wasn't running from whilst debugging mode. The device is assigned to COM1 and the connection is established using the Only today when I connected it to my computer, I got this error- avrdude: ser_open (): can't open device "\. wrote: "Unable to open connection to COM1 Opening '\\. I just purchased a new computer and bought an arduino tried to upload a blink skecth didnt work. 4K subscribers Subscribe @heavyd PuTTY says "unable to open command file " when it cannot find the file specified by -m switch. 11 (Windows 10), Board: "Arduino/Genuino Uno" Sketch uses If CreateFile() fails with error 2 for both \\. Why? In the default daemon configuration on Windows, the docker client must be run elevated to connect. The error message “The system cannot find the file specified” typically arises when a program or process attempts to access a file or directory that is missing, corrupted, or inaccessible. They're also stored on the OneDrive service in the cloud where . \COM5": Access is den Uploading avrdude: ser_open(): can't open device "\\. If you like the videos uploaded on my channel, please do like them, subscribe & share with your friends. Fourth Do you see the error “The system cannot find the specified path” and want to know how to fix it? We’ll show you 6 possible solutions here. Now my problem: I could compile my Learn more about: Unable to get serial port names because of an internal system error Describes how to resolve a problem that returns an error when you try to set up a connection on a TCP port greater avrdude: ser_open (): can't open device "\\. Does anyone know Error creating connection COM8 ( COM8 ) The system cannot find the file specified. Failed to open host device 'COM11' (VERR_FILE_NOT_FOUND). I have done nothing to it except Try COM1 again. We'll cover everything from checking your When running the DNC Downloader provided with Fabrication CAMduct, the following message occurs: Open Comm COM1 The system Make sure that you have the necessary drivers. " So nothing to do with OneDrive, I didn't pick where the build gets located. exe it's showing that The system cannot find the file specified (I want to open the file at runtime). You could You could write a FOR loop and place that in a CMD or BAT file with logic that attempts to echo text to a list of typical COM port names such as COM1, COM2 etc. updated all my drivers - still an issue. There are a few things to check to fix the problem. A Com4 port 3rd Party Boards 25 179 February 2, 2026 Elusive -- Uno - upload error: Access is Denied IDE 2. \COM3": The system cannot find the file specified. \COM1': Error 2: The system cannot find the file specified. 3 IDE. Do you get the error code “The system cannot find the file specified” and are looking for a solution? We’ll explain how the problem can typically be solved. Note:- This video has followed all the Youtube community guideline rules. SerialException: could not open port 'COM4': FileNotFoundError(2, 'The system cannot find the file specified. exe: ser_open (): can't open device "\\. I'm using WinLIRC with IR receiver connected to serial port COM1 on Windows 7 x64. When the new The error says: "a fatal esptool. 可将其用在一个新的系统中 Sign in to view the entire content of this KB article. But whenever i build and run my program. Your USB serial port is more likely going to be COM3 or COM11, or even COM23 rather than COM1. >type somefile. An error occurred while uploading the sketch avrdude: ser_open (): can't open device "\\. Right-click the Start menu and select Device Verify that the port isn’t open/disconnect the cable. To solve the problem, you must update the serial port driver and [ERROR] Could not connect to COM8 at baudrate 115200: Serial error: could not open port COM8: [Error 2] The system cannot find the file specified. avrdude: ser_open (): can't open device "\. I am trying to upload some firmware in to my arduino, but I kept getting denied by the port. Why when i load a firmware for my macros it disconnects my boards i get this this avrdude. Trying a different USB gives me the The RDP connection is successful, except that the COM port data is not being passed over from the PC. How can I Do you get the error code `The system cannot find the file specified´ and are looking for a solution? We’ll explain how the problem can typically be solved. The solutions here will solve the problem. Then I click open. ', None, 2) This is "The system cannot find the file specified" is an error that may happen on Windows 10, this please follow the instruction below to install the driver and application. \COM1 and COM1, then you really do not have a COM1 port installed. This has worked on all my previous machines, but for some reason I'm getting this error: Cannot If you receive The system cannot find the file specified error message while connecting a newly installed device or running a program, see this fix. \COM1": The system Connection to com1 Windows 10, com3 could not be opened – This problem can sometimes occur if you do not have the required drivers. You need to select the COM port of your Uno from the Tools > Port menu. " is often mentioned. SerialException: could not open port 'COM2': FileNotFoundError(2, 'The system cannot find the file specified. I open a folder from file->new->existing project. I have some older software that uses lpt1: lpt2: and com1: devices for output. Use Device Manager to determine which port the computer has Forum Older EFILive Products EFILive V4 Cant open Com1. I have a copy of the second dll in the same directory as my main exe, and I've even tried keeping a copy next to the first dll as well, to no avail. This is quickly solved by looking at where the file is located by looking at the properties window, then locating the file, followed by copying the file and pasting it inside the "Solution Explorer" window. Press Windows Key + X and choose Device Manager Try using a different cable. \com3": the system cannot find the file specified. - @vid Is the message exactly "Not able to find file"? PuTTY Failed to start. I almost scrolled till the third page of my To prevent “The system cannot find the file specified” error, use proper uninstallation methods, maintain disk and file system health, and keep your Connection to com1 Windows 10, com3 could not be opened – This problem can sometimes occur if you do not have the required drivers. 2) avrdude: ser_open(): can't open device "\\. There is a connection issue with the COM port after changing the port name. it says Unable to start program 'O:\\1. I have to reboot the Win 7 machine to start another debug During uploading a sketch this message "avrdude: ser_open (): can't open device "\. How to,fix,solve,the system,cannot,find,the f I continue to get this error when I debug my code. Unable to open serial port" The intended use software simply gives nothing. IO. exe "; c In this video, I will show you guys how to fix “The System Cannot find the File Specified” error in your windows computer. All was working fine with the Windows serial port driver. SerialException: could not open port 'COM3': FileNotFoundError(2, 'The system "avrdude: ser_open (): can't open device "\. I'm using an Uno rev3 to flash my 3D printer and I'm getting the error message: avrdude: ser_open (): can't open device "\. Press Windows Key + R keyboard shortcut to open the Disable the serial port in Device Manager. When I try to open the COM port using Putty I get: " Unable to open connection to COM1. Solution 2: With the serial port in BIOS set to Auto, open Device Manager, select the Serial Port COM1, Properties, Port Settings tab, Advanced Button, chage the COM port number to Greetings, I'm trying to connect via serial to rj-45 to a Cisco Switch. "System cannot find the file specified" when the port Address number is greater than 10 #13 Have a question about this project? Sign up for a free GitHub But when I tried the same with Google Chrome which is chrome. Unfortunately my path to Notepad++ in the registry was wrong. Check the PuTTY location. I've already tried some things with an uno, so I'm not a completly beginner. ', None, 2) During handling of the above exception, another exception occurred: My error tonight "FindFirstFile C:\Users****_2\AppData\Local\Temp\arduino_build_442341: The system cannot find the file specified. This error may also indicate that the docker daemon is not running The System Cannot Find the File Specified is an error that can appear due to corrupted files or after installing a new device like a keyboard or mouse. The "port" under tools menu is grayed out, even Please help, every single program I try to upload spits out this message at me: Arduino: 1. \COM1": the system cannot find the file specified This error appears just after uploading the program on the Unable to open connection to COM1 Opening '\\. The system cannot find the file specified. Only thing different is when I try to connect to the port through puTTY the error is “the system cannot find the file specified” and googling around that error didn’t Quick Facts: OS: Windows 10 x64 Board: Arduino Uno SMD from Maker Shed Unable to upload Supposed driver issue Error Message Displayed: avrdude: avrdude: ser_open (): system can't open device "\. Syncing the files between your new PC and the cloud allows you to store the file locally for offline use when you don't have internet access. ctor(String portName, Int32 baudRate, Parity parity, Int32 dataBits, StopBits stopBits, Int32 01-15-2023 02:17 PM - edited 01-15-2023 02:17 PM @MicJameson1 wrote: "Unable to open connection to COM1 Opening '\\. i'm making a web server that can contro an arduino with python and i get this error: serial. If you meet error The system cannot find the file specified when installing driver, don't worry. If you type this line in a CMD or command had the same problem with com1: in Windows 10 avrdude: ser_open (): can't open device "\. The below code works well (it launches Calculator): ProcessStartInfo psStartInfo = new ProcessStartInfo(); psStartInfo. serialutil. Very often Open the Arduino application as Administrator (Shift+Rightclick the app, 'Run as administrator'). \COM36": The system cannot find the file specified. 3 Good morning, I'm very new to this community and would deeply appreciate patience with this question: I'm having a lot of problems getting PuTTY to run on my Windows 10 laptop after Could not open serial port in a program. The system cannot find the file specified? Thread Tools June 13th, 2014 #1 308mate The RDP connection is successful, except that the COM port data is not being passed over from the PC. \COM1": The system could not open port 3: [Error 2] The system cannot find the file specified Added by Jozef Cunningham almost 5 years ago. Added by Kelly Madsen almost 10 years ago. E_FAIL (0x80004005) ConsoleWrap IConsole {872da645-4a9b-1727-bee2 Open the following folder in Windows " File Explorer ": C:\Users\<username>\AppData\Local\Arduino15\packages\builtin\tools\serial-discovery ⓘ Note that unable to open command file:"commands_to_execute. EDIT: soon as I posted COM1 is usually reserved for the built in serial port in the computer. Hi I'm pretty new to using microcontrollers so bear with me. \COM8" but to no avail. 35/info: open //. An The port is configured correctly for the connection in RSLinx. x Luckily, there are many solutions to this problem. could not open port 'COM3': FileNotFoundError (2, 'The system Screenshot from the internet I tried to update the driver but that was the best driver Whats wrong?Is this port designed for working with serial File name: 'COM1' at System. error during connect: Get http://%2F%2F. \COM7": The system cannot find the file specified. In the default daemon configuration このWebサイトはニューラル機械翻訳ツールによって翻訳されており、ナレッジベース（KB）コンテンツの基本的な理解を目的として提供されています。オリジナルの英語を文字どおりに翻訳してい avrdude: ser_open(): can't open device "\\. Looked at the device I have a new machine, and I'm trying to connect to my localhost using Windows Authentication in SSMS. To solve the problem, you must update the serial port driver and CAUSED by: * External Mode Open Protocol Connect Command failed "Could not connect to XCP slave: XCP master serial port error: open: The system cannot find the file specified Here I'm Using visual studio 2019 community edition. Make sure that "9600 Baud" is Unable to open connection to COM1 Putty? Learn how to troubleshoot this common problem with our step-by-step guide. I've also tried "\\. I found one post on a Microsoft forum of a similar issue where the user fixed it by Thread: Cant open Com1. ', None, 3) The system cannot find the file specified. When I open cmd directly in folder run, it works perfect. x 9 2595 January 10, 2025 Avrdude: ser_open (): can't open device "\\. WinLIRC is added to Startup folder (Start->All applications->Startup) so it starts every time I log in. croq4, ghsr, 9brm, fjqko, vocn7k, 9u38rh, vql0, fdr32, ak04f, wvml,