InDesign SDK Plugin won't load when I include openssl

[jasuryusupov]

Hello there, I've been developing a plugin for InDesign using SDK. I'm facing the issue of plugin not loading when I try to use OpenSSL library (version 3.14). The build is succeeding without any errors, but the plugin failing to load. Assertion window popping up and saying:

Cannot load plugin CHLINGUISTIC.SDK.PLN

D:\RESS\ID\19.0\Release\source\omlib\plugins\WPlugInListUtils.cpp (168)

I've installed openssl with vcpkg package manager, and enabled automatic linking to Visual Studio:

During building phase, there is this vcpkg related log:

1>Target VcpkgTripletSelection:
1>  Using triplet "x64-windows" from "C:\dev\vcpkg\installed\x64-windows\"
1>  Using normalized configuration "Debug"

There is 'libcrypto-3-x64.dll' file being created in the build directory alongside with plugin files:

Plugin building and loading successfully without any errors when I only include openssl headers:

#include <openssl/conf.h>
#include <openssl/evp.h>
#include <openssl/err.h>

But InDesign stops loading the plugin when I start using openssl components in my methods, for example:

EVP_CIPHER_CTX* ctx;
ctx = EVP_CIPHER_CTX_new();

So, I was wondering what could be the issue, since assertion window doesn't tell any usefull info, output window in Visual Studio stops after printing:

'InDesign.exe' (Win32): Loaded 'D:\Program Files\Adobe\SDK\InDesign\2024\build\win\debugx64\SDK\CHLinguistic.sdk.pln'. Symbols loaded.
'InDesign.exe' (Win32): Unloaded 'D:\Program Files\Adobe\SDK\InDesign\2024\build\win\debugx64\SDK\CHLinguistic.sdk.pln'
The thread 'com.adobe.ngl-null' (0x438c) has exited with code 0 (0x0).
The thread 'com.adobe.ngl-null' (0x730c) has exited with code 0 (0x0).

I hope you guys can help me out with the issue I'm facing. I'm looking forward to your responses. Thanks in advance!

[Olivier Beltrami]

@jasuryusupov 

At the risk of asking a dumb question; are you using a DEBUG version of InDesign ? The "normal" version of InDesign will not load plugins built with a debug configuration. Olivier

[jasuryusupov]

Yes I'm using the Debug version of InDesign

[Olivier Beltrami]

Another common gotcha is your plugin relying on a version of the ICU set of DLLs that is no longer shipped with InDesign. InDesign 2023 shipped with the ICU71 DLLs, but InDesign 2024 ships with the ICU73 DLLs.

[jasuryusupov]

I don't think software internationalization libraries - ICU71 and ICU73 DLLs are the reason for my plugin not loading, since the plugin is loading and working without any errors when I don't use openssl library.

[Dirk Becker]

Sounds like the dll is not found in that build location. I'd start reading about dll search order .