electron: failed to create tray icon: error processing argument at index 0, conversion failure

Okay, I figured it out. This will be useful for any Electron Forge users.

My tray path is coded as:

tray = new Tray(path.join(__dirname, 'assets', 'logoTemplate.png'));

The actual image is located in src/assets/logoTemplate.png

I had to modify webpage.main.config.js using the ‘copy-webpack-plugin’ npm module to copy src/assets into the webpack build directory.

contents of webpage.main.config.js;

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const assets = [ 'assets' ]; // src/asset directory

module.exports = {
	entry: './public/electron.js',     // fyi this path is not the default supplied by electron forge
	module: {
		rules: require('./webpack.rules'),
	},
	devServer: {
		contentBase: './dist',
		hot: true,
	},
	plugins: assets.map(asset => {
		return new CopyWebpackPlugin([
			{
				from: path.resolve(__dirname, 'src', asset),
				to: path.resolve(__dirname, '.webpack/main', asset)
			}
		]);
	})
};

Can confirm also happens on mac. I just upgraded from 7.1.1 to 8.0.0-beta.3 and I got the error.

Error processing argument at index 0, conversion failure from /Users/mo/dev/there3/desktop/main/static/tray/iconTemplate.png

I’m on macOS, and this was working on 6 and 7 version lines.

@dsteinman I can’t reproduce this with v8.2.3 on macOS 10.14. I tried @vladimiry’s repository linked in the issue, https://github.com/vladimiry-playground/electron-quick-start-tray-issue, and it seems to work fine with no error messages.

I just tried this as well, and it DOES work so it’s probably a configuration error on my end.

I suppose the problem could be simply the file is not found. I’m using electron forge / webpack which mucks with the paths of the files.

It’s an issue with underlying type marshalling between c++ and js - it’s platform agnostic.

I’ll hopefully have a fix up soon.