PCH Warning: header stop cannot be in a macro or #if block - Visual C++ 2010 Express SP1

This is pasted from a website, which presumably was working. I did some googling and found that the issue I have now is a result of Visual C++ 2010 SP1, which I downloaded today, and is now giving me this error:

PCH Warning: header stop cannot be in a macro or #if block.

Hopefully someone will be able to help me with this!

#ifndef APP_STATE_H
#define APP_STATE_H

#include "Framework.h"

class AppState; //this line is giving me the error

//define two classes

#endif

Framework.h:

#ifndef OGRE_FRAMEWORK_H
#define OGRE_FRAMEWORK_H

#include <OgreCamera.h>
#include <OgreEntity.h>
#include <OgreLogManager.h>
#include <OgreOverlay.h>
#include <OgreOverlayElement.h>
#include <OgreOverlayManager.h>
#include <OgreRoot.h>
#include <OgreViewport.h>
#include <OgreSceneManager.h>
#include <OgreRenderWindow.h>
#include <OgreConfigFile.h>

#include <OISEvents.h>
#include <OISInputManager.h>
#include <OISKeyboard.h>
#include <OISMouse.h>

class OgreFramework : public Ogre::Singleton<OgreFramework>,OIS::KeyListener,OIS::MouseListener{
public:
	OgreFramework();
	~OgreFramework();

	bool initOgre(Ogre::String wndTitle, OIS::KeyListener *pKeyListener = 0, OIS::MouseListener *pMouseListener = 0);
	void updateOgre(double timeSinceLastFrame);
	
	//OIS
	bool keyPressed(const OIS::KeyEvent &keyEventRef);
	bool keyReleased(const OIS::KeyEvent &keyEventRef);
	bool mouseMoved(const OIS::MouseEvent &evt);
	bool mousePressed(const OIS::MouseEvent &evt, OIS::MouseButtonID id);
	bool mouseReleased(const OIS::MouseEvent &evt, OIS::MouseButtonID id);

	Ogre::Root* mRoot;
	Ogre::RenderWindow* mRenderWnd;
	Ogre::Viewport* mViewport;
	Ogre::Log* mLog;
	Ogre::Timer* mTimer;

	//OIS
	OIS::InputManager* mInputMgr;
	OIS::Keyboard* mKeyboard;
	OIS::Mouse* mMouse;
private:
	OgreFramework(const OgreFramework&);
	OgreFramework& operator= (const OgreFramework&);
};

#endif

I had the same issue and was looking for a solution. Following worked for me:

Add #pragma once at the start of the file (even before the #ifndef APP_STATE_H header guard)

You probably used a project template to get started and threw away the pre-generated source code files. Those project templates like to turn on precompiled headers because it is such a time-saver. Right-click your project in the Solution Explorer window, Properties, C/C++, Precompiled Headers. Change the "Precompiled Header" setting to "Not Using".

1.Close the Project. 2.Reopen the project,and all ok. this is my expeirence.

move the #include statements outside the #if #end block

Rebuilding IntelliSense database solves the problem.

1. Close Visual Studio
2. Delete [SolutionName].sdf
3. Delete DllWrappers.opensdf
4. Delete ipch folder
5. Open Visual Studio

I had the same problem. My solution was to add a missing ';' at the end of a class definition. Although this does not seem to apply to your problem, others who come here with the same error might find this helpful.

This is probable a day late and a dollar short but I had the same error when I accidentally put my header file in a .cpp file instead of a .h file. I will post it though in case it can help someone.

I just added a referenct to the header file (#include "header.h") and it helped.

I found that my .h file was actually being treated as a .cpp file! Right click on the file in the Solution Explorer > All Configurations > Item Type: C/C++ header

Make sure the item type is not C/C++ compiler or other.

Once you add a .cpp file and have it include the header this error should go away. I've read some where else this is a bug.

I use Visual Studio to edit Linux projects. For me, the issue was present when I include string.h in my precompiled header file. It was caused by lines that have an __asm statement, for example:

__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));

The solution was to define the following macro under Project Properties, Configuration Properties, C/C++, Preprocessor, Preprocessor Defines:

__asm(x)=