Why isn't OPC Gateway Service seeing Windows system environment variables?

[jamesbraza]

Here is what I have gathered to do, using PowerShell on Windows 10 Pro:

git clone git@github.com:iterativ/openopc2.git
cd openopc2
pyenv local 3.10.9
python -m venv venv
.\venv\Scripts\activate
python -m pip install -e . "pyinstaller>=5.6.2,<6"
pyinstaller --onefile --clean --noconfirm --paths ./openopc2 `
    --hidden-import=json --hidden-import=win32timezone --hidden-import=pythoncom  `
    --name OpenOpcService openopc2/gateway_service.py
.\dist\OpenOpcService.exe debug

Why no poetry? I don't really like poetry for various reasons, mainly poetry shell is still a work-in-progress imo. I cargo-culted the pyinstaller line from here.

Windows user or system environment variables aren't getting seen by OpenOpcService.exe, what am I doing wrong?

OpenOpcService Starting service on port 7766
Open Opc Config:
OPC_HOST              : localhost
OPC_SERVER            : Matrikon.OPC.Simulation
OPC_CLIENT            : OpenOPC
OPC_GATEWAY_HOST      : 192.168.0.115
OPC_GATEWAY_PORT      : 7766
OPC_CLASS             : Graybox.OPC.DAWrapper
OPC_MODE              : gateway
OPC_TIMEOUT           : 1000
Traceback (most recent call last):
  File "gateway_service.py", line 106, in <module>
  File "win32serviceutil.py", line 864, in HandleCommandLine
  File "win32serviceutil.py", line 653, in DebugService
  File "win32serviceutil.py", line 1119, in SvcRun
  File "gateway_service.py", line 52, in SvcDoRun
  File "gateway_server.py", line 101, in main
  File "Pyro5\server.py", line 237, in __init__
  File "Pyro5\svr_threads.py", line 124, in init
  File "Pyro5\socketutil.py", line 278, in create_socket
OSError: [WinError 10049] The requested address is not valid in its context
[2816] Failed to execute script 'gateway_service' due to unhandled exception!

[renzop]

Did you restart the shell or even the pc after changing the value of the variable? Test it by getting the raw value out in the shell.

On Sat, 7 Jan 2023 at 01:02, James Braza @.***> wrote:

Here is what I have gathered to do, using PowerShell on Windows 10 Pro:

git clone @.***:iterativ/openopc2.git cd openopc2 pyenv local 3.10.9 python -m venv venv .\venv\Scripts\activate python -m pip install -e . "pyinstaller>=5.6.2,<6" pyinstaller --onefile --clean --noconfirm --paths ./openopc2 --hidden-import=json --hidden-import=win32timezone --hidden-import=pythoncom --name OpenOpcService openopc2/gateway_service.py .\dist\OpenOpcService.exe debug

Why no poetry? I don't really like poetry for various reasons, mainly poetry shell is still a work-in-progress imo. I cargo-culted the pyinstaller line from here https://github.com/iterativ/openopc2/blob/3dc6a9522a3a5f30b243b4b8e44fb7409a2a1388/scripts/build_executables.ps1#L2 .

Windows user or system environment variables aren't getting seen by OpenOpcService.exe, what am I doing wrong?

[image: image] https://user-images.githubusercontent.com/8990777/211119247-9ddcde9d-26ab-488e-b7d2-e7d1e396095f.png

OpenOpcService Starting service on port 7766 Open Opc Config: OPC_HOST : localhost OPC_SERVER : Matrikon.OPC.Simulation OPC_CLIENT : OpenOPC OPC_GATEWAY_HOST : 192.168.0.115 OPC_GATEWAY_PORT : 7766 OPC_CLASS : Graybox.OPC.DAWrapper OPC_MODE : gateway OPC_TIMEOUT : 1000 Traceback (most recent call last): File "gateway_service.py", line 106, in File "win32serviceutil.py", line 864, in HandleCommandLine File "win32serviceutil.py", line 653, in DebugService File "win32serviceutil.py", line 1119, in SvcRun File "gateway_service.py", line 52, in SvcDoRun File "gateway_server.py", line 101, in main File "Pyro5\server.py", line 237, in init File "Pyro5\svr_threads.py", line 124, in init File "Pyro5\socketutil.py", line 278, in create_socket OSError: [WinError 10049] The requested address is not valid in its context [2816] Failed to execute script 'gateway_service' due to unhandled exception!

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[jamesbraza]

Okay I took a deeper look at this today. What I was doing was invoking .\dist\OpenOpcService.exe debug using PowerShell, but adding the new environment variables with the PowerShell window still open.

Test it by getting the raw value out in the shell.

By doing this testing with os.environ, I learned PowerShell requires a restart to intake new environment variables. This is actually documented behavior: Windows PowerShell Tip of the Week

One thing to watch out for: when we used SetEnvironmentVariable to create a new user- or machine-level environment variable that variable didn’t always show up when we ran this command in Windows PowerShell:

Get-ChildItem Env:

Or at least it didn’t show up until we restarted PowerShell. (Or started up a new instance of PowerShell.)

Okay so, if you add environment variables, make sure you close PowerShell/PyCharm/etc before kicking off OpenOpcService.exe.

I also verified that both user and system environment variables will be read by OpenOpcService.exe.

Case closed! Feel free to let me know if you have any follow up comments.