Propagation Quality Doesn't Show if Running Pat as a Service on macOS

[Joel Black]

I cannot figure out what's going on with my setup. I installed both Pat and VOACAP via Homebrew. If I start Pat as a service (brew services start pat), VOACAP percentages do not show in the web UI. If I don't start Pat as a service and just start the http server manually (pat http), VOACAP percentages *do* show in the web UI.

Can someone tell me why?

Thanks,

Joel - W4JBB

[Martin Hebnes Pedersen]

Hi,

I'm guessing this is because Pat is unable to find the voacapl executable due to some environment ($PATH) differences when launched as a system service. I will have to look into that.

In the mean time, you can set the executable path explicitly in Pat's config file. More details on that here: https://github.com/la5nta/pat/wiki/HF-Propagation-Prediction#advanced-configuration

-- 

73 de LA5NTA / Martin

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[Joel Black]

Martin,

I tried adding the path to my config file but I still am not getting the propagation predictions. Is my syntax (in red) correct?  Placed at the end of the file:

"schedule": {},

  "version_reporting_disabled": false,

  "prediction": {

  "engine": "voacap",

  "voacap": {

    "executable": "/opt/homebrew/bin/voacapl",

    "data_dir": "/opt/homebrew/share/voacapl/itshfbc"

  }

}

}

Regards,

Joel, W4JBB

[Martin Hebnes Pedersen]

Hi again Joel,

Did you remember to restart Pat after your config changes?

I just copy-pasted your snippet into my config.json, and it works as expected on my mac.

By the way - When you configure the prediction engine explicitly like this, you should also see an error on startup if something is wrong, like this:

"Failed to initialize VOACAP: failed to find executable: stat /opt/homebrew/bin/voacapla: no such file or directory»

(In this case I deliberately added a typo to the executable path).

— 

73 de LA5NTA / Martin

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[Joel Black]

Martin,

I must not have restarted Pat. After I did that, I now see the propagation percentages.

Thanks,

Joel, W4JBB

[Martin Hebnes Pedersen]

Hi again Joel,

I was able to reproduce your issue, and have pushet a fix to the homebrew tap for Pat.

If you run brew upgrade && brew reinstall pat, you should be able to use voacapl without the explicit config.

Thanks for reporting this!

-- 

73 de LA5NTA / Martin

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[Joel Black]

Martin,

This seems to be working correctly. I removed those lines from my config.json file that pointed to the voacapl executable and tested last night and this morning. Both times, I was able to see the VOACAP percentages.

Thanks,

Joel - W4JBB