QtPluginLoader fails to load plugin if I use Tensorflow functions in it

fugreh

I am making a plugin as a project in Visual Studio 2017 which loads a Tensorflow model and uses it in an application. The plugin includes a class which loads a Tensorflow model and links with Tensorflow 1.7 (built for Release, I also build the plugin for Release). If I comment out all of the functions and structures from the Tensorflow library (e.g., tensorflow::GraphDef, etc.) then the plugin loads. If I uncomment them it fails to load:

QPluginLoader *loader = new QPluginLoader(pluginsDir.absoluteFilePath(pluginPath));
QObject *plugin = loader->instance(); // plugin is NULL

plugin->errorString() is

"CNNPlugin.dll" "Cannot load library ...\\bin\\Release\\plugins\\CNNPlugin.dll: The specified module could not be found."

But it is there, and it loads just fine if I comment out all Tensorflow related code as mentioned. I tried linking with and running tensorflow in a simple C++ console application and that worked without issue.

Christian Ehrlicher

Make sure the TensorFlow library is in your Path when trying to load the library.

JKSH

@fugreh said in QtPluginLoader fails to load plugin if I use Tensorflow functions in it:

But it is there, and it loads just fine if I comment out all Tensorflow related code as mentioned.

To clarify @Christian-Ehrlicher's comment: Qt can't load your plugin if it can't find the TensorFlow libraries

I tried linking with and running tensorflow in a simple C++ console application

In this test, how did you tell Qt where to find the TensorFlow libraries?

fugreh

Thanks for your input, the problem was that the DLL was actually not in the place where it should have been, my mistake.