Qt plugin error, message in load "cannot load library"

Arturo Pablo R

I use Qt 5.3.2 with msvc 2010, I have the following use case, create an interface class and this class is used in a Qt plugin, the program and plugins compile fine, but when I execute the program and this try instance or load plugins, mark "cannot load library ..., the specified module could not be found.
This is header of Interface:

   class ServicesInterface{

  public:
    virtual ~ServicesInterface() {}

virtual QString name()  = 0;
virtual int port() = 0;
}
 Q_DECLARE_INTERFACE(ServicesInterface, "services.ServicesInterface");

The header of plugin is this:

  class BusControllerPlugin : public QObject, public ServicesInterface{
     Q_OBJECT
     Q_PLUGIN_METADATA(IID "busControllerPlugin.ServicesInterface")
      Q_INTERFACES(ServicesInterface)  
    public:
     BusControllerPlugin();
    ~BusControllerPlugin();
 }

And this is how I try to load and instantiate the plugins, in the main.cpp.

   QPluginLoader loader(pluginsDir.absoluteFilePath(fileName));
    qDebug() << "fileName: " << pluginsDir.absoluteFilePath(fileName);

    loader.load();
    if(ServicesInterface *interface =          qobject_cast<ServicesInterface *>(loader->instance())) {
    connect(interface, SIGNAL(pluginSend(const DeviceMessage&)), this, SLOT(msgFromPlugin(const DeviceMessage&)));

      interfaces.append(interface);**strong text**
     }
  else{
    qDebug()<<"error loading plugin:"<<loader.errorString()<<";metadata:"<<loader.metaData();
 }

I read many tutorials and I don't see difference, this system was compiled with Qt 5.2, but actually I use 5.3.2, and happens this, exist new guide or form to create and load plugins? Or I missed something.

Pd. I not use Qt Creator, i compile with custom script, the compilation is fine.

SGaist

Hi and welcome to devnet,

Do you mean that you are using the plugin compiled with 5.2 with a 5.3.2 built project ?