<![CDATA[Python plugin works in NPP 7.7 but does work in NPP 7.8 upward]]>Dear community,

I need some help regarding supporting of my Python plugin.

https://github.com/stier08/NppPyStandalone

In a nutshell it allows calling scripts written in python directly from NPP IDE .

The latest version linked against winpython 3.7 / boost 1.68 / vs toolset v140 works fine with npp.7.7.1.bin

However, starting from NPP 7.8 upward I’m getting an error “<plugin> is not compatible with current version of notepad++.”

Apparently something has changes in NPP and I cant figure out what exactly…

To troubleshoot the problem I built a bare minimal Plugin ( based on https://github.com/npp-plugins/plugindemo

by linking it with boost::python

#include <boost/python/module.hpp>
#include <boost/python/class.hpp>
#include <boost/utility.hpp>

without calling any python stuff.

and even such a small change cases loading error in NPP 7.9.

NPP 7.7 works fine.

Can someone suggest what is the root cause / what need to changes / how to troubleshoot this.

Thank you in advance,
stier08.

]]>https://community.notepad-plus-plus.org/topic/20647/python-plugin-works-in-npp-7-7-but-does-work-in-npp-7-8-upwardRSS for NodeFri, 17 Jul 2026 05:10:37 GMTThu, 28 Jan 2021 13:45:24 GMT60<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Sat, 30 Jan 2021 06:41:58 GMT]]>@Ekopalypse cool, thanks for advice, turned out to be pywin32_system32 not being searched for some reason

Untitled.png
Apparently lookup path was (intentionally screwed up) modified

I managed to fix my problem by placing pywintypes38.dll and pythoncom38.dll to NPP root

]]>https://community.notepad-plus-plus.org/post/62334https://community.notepad-plus-plus.org/post/62334Sat, 30 Jan 2021 06:41:58 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Fri, 29 Jan 2021 18:59:52 GMT]]>@Stier-Hahn

there is an additional
...\AppData\Roaming\Python\Python38\site-packages
path when used by the command line.
Maybe give it a try to add it to your sys.path from embedded python.

Do you know procmon?
It could be used to see what npp and your plugin tries to load with a filter set to path contains whatever

48b96c60-c947-48f4-9987-af19cf359c3d-image.png

If importing pywin32 failed with unable to load dll
then one of those
2f2d6355-c2f6-4c2c-b92d-c49ef97d7714-image.png
can not be found I guess.
python38 shouldn’t be the problem but pywintypes38.dll might be in this additional path I’ve mentioned earlier??

]]>https://community.notepad-plus-plus.org/post/62314https://community.notepad-plus-plus.org/post/62314Fri, 29 Jan 2021 18:59:52 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Fri, 29 Jan 2021 16:04:52 GMT]]>@Stier-Hahn pywin32 is installed sort of correctly as it works from python command line.

]]>https://community.notepad-plus-plus.org/post/62309https://community.notepad-plus-plus.org/post/62309Fri, 29 Jan 2021 16:04:52 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Fri, 29 Jan 2021 16:03:03 GMT]]>@Ekopalypse you are doing great job , thank you !

ps
I came across a next roadblock , that’s more a pywin32 issue.

See https://github.com/mhammond/pywin32/issues/1658

May be you would have a hint how to troubleshoot that. as that seems to be sort of related to dependency lookup process.

In a nutshell I’ve NPP plugin linked against boost::python which loads at startup some initialization python code. And it’s was working fine under py 3.7 and npp 7.7.

Finally ( with your help) I managed to upgrade npp from 7.7 to 7.9
and partially from winpython 3.7 to winpython 3.8.

My NPP python plugin is loaded at startup, but execution of initialsation python scripts fails to import win32api.
Embedded python wrapper is working fine ( I guess ) as import os / import sys and other simple code is working inside my plugin.

I’m using win py 3.8 and latest pywin32 ( 300)

]]>https://community.notepad-plus-plus.org/post/62308https://community.notepad-plus-plus.org/post/62308Fri, 29 Jan 2021 16:03:03 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Fri, 29 Jan 2021 11:18:55 GMT]]>If there is anything we can do to help let us know.

]]>https://community.notepad-plus-plus.org/post/62303https://community.notepad-plus-plus.org/post/62303Fri, 29 Jan 2021 11:18:55 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Fri, 29 Jan 2021 09:46:11 GMT]]>@Ekopalypse so, I’ve tested my minimal plugin build in 7.8 with python37.dll inside plugin dir and it works.

My question from the top of the thread has been solved.

Thank you very much!

ps

I still need to check if my main plugin will be working…
Struggling to upgrade third-party libs and other dependencies…

]]>https://community.notepad-plus-plus.org/post/62302https://community.notepad-plus-plus.org/post/62302Fri, 29 Jan 2021 09:46:11 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:26:40 GMT]]>@Stier-Hahn

I start to remember that I read some conversation about
security concerns regarding sideloading dlls.

]]>https://community.notepad-plus-plus.org/post/62294https://community.notepad-plus-plus.org/post/62294Thu, 28 Jan 2021 20:26:40 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:24:38 GMT]]>but npp 7.7 works.

]]>https://community.notepad-plus-plus.org/post/62293https://community.notepad-plus-plus.org/post/62293Thu, 28 Jan 2021 20:24:38 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:23:40 GMT]]>and next window is
81824459-8282-4997-9a08-23912af2543b-image.png

]]>https://community.notepad-plus-plus.org/post/62292https://community.notepad-plus-plus.org/post/62292Thu, 28 Jan 2021 20:23:40 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:24:59 GMT]]>@Stier-Hahn
Yes, it is not found but then I do get

6925989c-f96a-49a9-bc06-d9fe35ba80a0-image.png

]]>https://community.notepad-plus-plus.org/post/62291https://community.notepad-plus-plus.org/post/62291Thu, 28 Jan 2021 20:24:59 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:20:54 GMT]]>@Stier-Hahn - currently trying

]]>https://community.notepad-plus-plus.org/post/62290https://community.notepad-plus-plus.org/post/62290Thu, 28 Jan 2021 20:20:54 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:20:26 GMT]]>@Ekopalypse could you please check if it works for you if python dll is located in path and not in plugin dir

]]>https://community.notepad-plus-plus.org/post/62289https://community.notepad-plus-plus.org/post/62289Thu, 28 Jan 2021 20:20:26 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:18:34 GMT]]>Ah - could it be that path is not evaluted anymore? I guess so.

]]>https://community.notepad-plus-plus.org/post/62288https://community.notepad-plus-plus.org/post/62288Thu, 28 Jan 2021 20:18:34 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:17:39 GMT]]>Starting from 7.8 plugins are allowed to load their own dlls from within the plugin directory.

]]>https://community.notepad-plus-plus.org/post/62287https://community.notepad-plus-plus.org/post/62287Thu, 28 Jan 2021 20:17:39 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:18:09 GMT]]>@Ekopalypse will check tmr in more details.

I can tell for sure (99%) I do not have any 64 bit builds of python on my box.

Ps
I’m still wondering that it works for me in 7.7 but not in 7.8. Just for my understanding were there any changes that could cause such behavior? Changes in dll lookup order or something

]]>https://community.notepad-plus-plus.org/post/62286https://community.notepad-plus-plus.org/post/62286Thu, 28 Jan 2021 20:18:09 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:12:51 GMT]]>@Stier-Hahn
and there is no other python3 dll (64bit) in the path before the 32bit one?

]]>https://community.notepad-plus-plus.org/post/62284https://community.notepad-plus-plus.org/post/62284Thu, 28 Jan 2021 20:12:51 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 20:10:56 GMT]]>@Ekopalypse i’ve bin using same setup. I.e. only plugin dll is located in plugin dir. And python dir in path.

]]>https://community.notepad-plus-plus.org/post/62283https://community.notepad-plus-plus.org/post/62283Thu, 28 Jan 2021 20:10:56 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 19:18:06 GMT]]>Works for me

8b16aa0a-e0b6-4f72-ba92-e5895457c5aa-image.png

Where is your python3.dll located in 7.8?
Should be within your plugin directory.

]]>https://community.notepad-plus-plus.org/post/62280https://community.notepad-plus-plus.org/post/62280Thu, 28 Jan 2021 19:18:06 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 19:09:23 GMT]]>Let me do some tests with your code and the mentioned npp versions.

]]>https://community.notepad-plus-plus.org/post/62278https://community.notepad-plus-plus.org/post/62278Thu, 28 Jan 2021 19:09:23 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 19:05:06 GMT]]>@Ekopalypse said in Python plugin works in NPP 7.7 but does work in NPP 7.8 upward:

/exports

see my previous post on build setup

here is what I get with dumpin

Microsoft ® COFF/PE Dumper Version 14.28.29336.0
Copyright © Microsoft Corporation. All rights reserved.

Dump of file NppPluginTemplate.dll

File Type: DLL

Section contains the following exports for NppPluginTemplate.dll

00000000 characteristics
6013057D time date stamp Thu Jan 28 19:42:05 2021
    0.00 version
       1 ordinal base
       6 number of functions
       6 number of names

ordinal hint RVA      name

      1    0 000010E0 beNotified
      2    1 000010C0 getFuncsArray
      3    2 000010B0 getName
      4    3 000010F0 isUnicode
      5    4 000010F0 messageProc
      6    5 00001040 setInfo

Summary

    2000 .data
    1000 .gfids
    6000 .rdata
    1000 .reloc
    1000 .rsrc
    D000 .text
]]>https://community.notepad-plus-plus.org/post/62277https://community.notepad-plus-plus.org/post/62277Thu, 28 Jan 2021 19:05:06 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 18:58:57 GMT]]>@Ekopalypse thank you for your feedback.
I’ve created a minimal binary that works with 7.7 and does not work with 7.8

https://github.com/stier08/NppPyStandalone/releases/tag/NppPluginTemplate_minimal_boost-1_68_0_vs2019_toolset_v140_wp37_01

Source code https://github.com/stier08/NppPyStandalone/tree/minimal_boost-1_68_0_vs2019_toolset_v140_wp37

My setup is as follows

boost-1_68_0
vs2019
toolset v140
wp37 (Winpython32-3.7.7.1dot)

Plugin does work with
https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v7.7.1/npp.7.7.1.bin.7z

but does not work with

https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v7.8/npp.7.8.bin.7z

]]>https://community.notepad-plus-plus.org/post/62276https://community.notepad-plus-plus.org/post/62276Thu, 28 Jan 2021 18:58:57 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 13:59:03 GMT]]>@Stier-Hahn said in Python plugin works in NPP 7.7 but does work in NPP 7.8 upward:

NPP 7.7 works fine.

Does that mean, the same, recently compiled dll, works here but not with 7.9.X??

]]>https://community.notepad-plus-plus.org/post/62262https://community.notepad-plus-plus.org/post/62262Thu, 28 Jan 2021 13:59:03 GMT<![CDATA[Reply to Python plugin works in NPP 7.7 but does work in NPP 7.8 upward on Thu, 28 Jan 2021 13:54:50 GMT]]>@Stier-Hahn

How do you compile the dll? Using Visual Studio, gcc …? Which version?

Are the exports really exported? Using dumpbin like dumpbin /exports YOUR_PLUGIN.dll will give you that information.

]]>https://community.notepad-plus-plus.org/post/62261https://community.notepad-plus-plus.org/post/62261Thu, 28 Jan 2021 13:54:50 GMT