Cocos2D 2.0 – Zillions of OpenGL errors

OpenGL error 0x506 = GL_INVALID_FRAMEBUFFER_OPERATION

Main difference between Cocos2D 2.0 and Cocos2D 1.0 is OpenGLES version. Cocos2D 2.0 uses OpenGLES 2.0 and Cocos2D 1.0 uses OpenGLES 1.0.

I guess you may used API that is not found in OpenGLES2.0 that found in OpenGLES 1.0

Example:GLBegin(), GLLineWidth() etc

Use this draw function:

-(void) draw
{
    [super draw];
    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );
    kmGLPushMatrix();
    self.world->DrawDebugData();    
    kmGLPopMatrix();
}

Instead of this:

-(void) draw
{
    glDisable(GL_TEXTURE_2D);
    glDisableClientState(GL_COLOR_ARRAY);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);

    world->DrawDebugData();

    // restore default GL states
    glEnable(GL_TEXTURE_2D);
    glEnableClientState(GL_COLOR_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

}

Also use GLES-Render.h and GLES-Render.m from Cocos2D 2.0