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Preview HTML plugin fails to install, without error message #83

vor0nwe opened this issue Apr 25, 2019 · 2 comments


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commented Apr 25, 2019

The plugin was added as per pull request #67. As far as I can see, it should work fine.

In a clean install of Notepad++ 7.6.6 (64-bits), the Plugins Admin shows the plugin normally. If I try to install it, however, Notepad++ restarts but the plugin is not installed, no menu entry is created, no plugin directory is created, nothing is done as far as I can see. No message is shown, either.

Is there some log where I can read what the updater has (not) done, and for what reason?

If not, what can I do to figure out what's going wrong, and why the plugin wasn't installed?


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commented Apr 26, 2019

if i use telerik fiddler to monitor the web traffic, at an installation attempt no traffic is initialised to or

i have no idea why though, but i would suggest to try with an url not requiring post parameters, like: as this is the only difference to other urls i can see on the quick.


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commented Apr 26, 2019


as i can see, your site is generating the zips of your packages on demand, and the name= parameter defines the sub-folder name within your generated zips, omitting to generate a sub-folder, if name= is left empty.

available solutions:

  1. you have to url encode your get parameters, to get them working, test them, and make a new pr.
  2. you have to provide static content packages that don't require get parameters, test them, and make a new pr.

here is a working PreviewHTML x86 example with url encoded get params:

			"folder-name": "PreviewHTML",
			"display-name": "Preview HTML",
			"version": "",
			"id": "b7538d5b4c61e7232ad6befe3a5eb1799544a4de741d4acd896716e9273f260b",
			"repository": "",
			"description": "Preview HTML files inside Notepad++ (or in a floating window) without having to save them first.",
			"author": "Martijn Coppoolse",
			"homepage": ""

important note: please debug test your next pr before you submit it.

guide how to test a custom nppPluginList on 7.6.6 x86:

  • download and extract it to your desktop.

  • download pl.x86.json
    copy it to npp.7.6.6.bin\plugins\Config and rename it to nppPluginList.json.

  • rename npp.7.6.6.bin\plugins\Config\nppPluginList.dll to nppPluginList.dl_ to make sure you don't use it by accident.

  • download Notepad++.Win32.Unicode Debug.exe
    and copy it to npp.7.6.6.bin\

  • launch npp.7.6.6.bin\Notepad++.Win32.Unicode+Debug.exe to edit and test your personal nppPluginList.json file.

(repeat the same for x64, using the x64 files)

many thanks for your great plugin and best regards.

@MetaChuh MetaChuh closed this Apr 26, 2019

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