error win10

[xuhaihui]

use composer

[ErrorException]
proc_open(NUL): failed to open stream: No such file or directory

I don't know how to solve this problem

[johnstevenson]

This error has come up a couple of times recently here (#7083, #7112) and also on Git for Windows (git-for-windows/git#1554) where it can manifest as a crash or a bash: /dev/null error.

It is a Windows configuration error that could be caused by almost anything (perhaps even failed or badly behaving Windows updates?). The bottom line is that the Windows service that handles output to nul is either not installed or has not been enabled.

Open a Command Prompt as an admin and type sc query null. On Windows 10 you should see something like this:

SERVICE_NAME: null
        TYPE               : 1  KERNEL_DRIVER
        STATE              : 4  RUNNING
                                (STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN)
        WIN32_EXIT_CODE    : 0  (0x0)
        SERVICE_EXIT_CODE  : 0  (0x0)
        CHECKPOINT         : 0x0
        WAIT_HINT          : 0x0

If you get an error message saying The specified service does not exist as an installed service. then you are probably going to have to reinstall (or reset) the operating system.

If the STATE line does not say RUNNING then you can try and start it by typing sc start null, which may or may not work, depending on whether it has been stopped or simply not started.

You need to make sure that this service runs at start-up and you can see how it is configured by typing typing sc qc null

SERVICE_NAME: null
        TYPE               : 1  KERNEL_DRIVER
        START_TYPE         : 1   SYSTEM_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   :
        LOAD_ORDER_GROUP   : Base
        TAG                : 1
        DISPLAY_NAME       : Null
        DEPENDENCIES       :
        SERVICE_START_NAME :

If it is set up correctly you will see SYSTEM_START as the START_TYPE. If not you must type:

sc config null start= system

You will need to restart the computer for this to take effect (ie. if your attempt to start the service had failed).

[Tjark-Kuehl]

So I'm currently having exactly the same issue but also exactly the same console output as seen in the solution. That means its not misconfigured right?

[ozgurg]

@johnstevenson The solution worked! Thanks a lot.

[johnstevenson]

@OzgurGorgulu That's great to know.

[ghost]

@johnstevenson I'm having the same issue as @Tjark-Kuehl . My output is exactly the same as your in the solution but I still get the error.
Also it only happens in folders that have "composer.json" in it. If I just do "composer" on Desktop it works.

[osirion]

If you're using Remote Profiles / Folder redirection - this issue will occur if you're redirecting to a remote %appdata% location. Change it to local and it will work.

[isheraz]

This is probably one of the 3 issues if your using windows 10.
1- Php version below 7.2
2- Window null issue mentioned by above
3- Ur Project is in One Drive and the File System is not supported.

I solved it by moving the project out of the One Drive Directory.

[MeesterDaaf]

Thank you so much @isheraz. The OneDrive issue solved it. My students will be very happy....

[S-Tian86]

This is probably one of the 3 issues if your using windows 10.
1- Php version below 7.2
2- Window null issue mentioned by above
3- Ur Project is in One Drive and the File System is not supported.

I solved it by moving the project out of the One Drive Directory.

Thank you so much @isheraz. The OneDrive issue solved it. My students will be very happy....

El proyecto siempre lo he tenido en la carpeta de One Drive, pero ahora después de que actualicé Windows a la version 1909 me falló. Moví el proyecto a otra carpeta y volvió a funcionar. Muchas gracias.

[stof]

Note that Google Drive can cause the same kind of issues that OneDrive.

[yangjiafei]

This problem i have solved. find the system file 'C:/windows/system32/drivers/null.sys'. use other right file replace it. My system is win10，After I installed the wamp3 （but it no run）. Compoer can't be used. It say 'proc_open(NUL): failed to open stream: No such file or directory'. At the same time, git bash automatically close when i open it. never can open for more than three seconds, and the file mintty.exe.stackdump be created in the folder where i open the git bash. after i replace the null.sys use a new one, 'sc query null ' display STATE is RUNNING.

This is reference material : https://www.jianshu.com/p/1642eedab81b

[carouselcarousel]

This problem i have solved. find the system file 'C:/windows/system32/drivers/null.sys'. use other right file replace it. My system is win10，After I installed the wamp3 （but it no run）. Compoer can't be used. It say 'proc_open(NUL): failed to open stream: No such file or directory'. At the same time, git bash automatically close when i open it. never can open for more than three seconds, and the file mintty.exe.stackdump be created in the folder where i open the git bash. after i replace the null.sys use a new one, 'sc query null ' display STATE is RUNNING.

This is reference material : https://www.jianshu.com/p/1642eedab81b

Is there anyone who have the null.sys which needs to be changed? File has been removed.

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\DOS Devices
NUL = \Device\Null

When I try to run "sc start null"
[SC] StartService FAILED 1058:
The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.

Also tried creating the folders but diddn't worked.
C:\dev\null
C:\Program Files\git\dev\null

I have the same problem (After windows update). It's worked before. Now can't even isntall the latest version Git-2.41.0.3-64-bit.exe .