OpenGL glFramebufferRenderbuffer() get error: GL_INVALID_OPERATION, status: GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT -

i'm trying texture rendering using cocos2d , opengl.

after called

glframebufferrenderbuffer(gl_framebuffer, gl_depth_attachment, gl_renderbuffer, _depthrenderbufffer) 

i checked status, using:

glenum status = glcheckframebufferstatus(gl_framebuffer); 

and turned out status gl_framebuffer_incomplete_attachment

i checked error using

glenum error = glgeterror(); 

and result gl_invalid_operation

according the documentation cause of gl_invalid_operation because:

• the default framebuffer object name 0 bound. or
• if renderbuffer neither 0 nor name of existing renderbuffer object

i checked framebuffer , renderbuffer, neither of them 0, not sure wheather there other rederbuffer object has same name.

does 1 know how fix issue?

the detailed code using:

.....  glint oldrbo; glgetintegerv(gl_renderbuffer_binding, &oldrbo);   // generate fbo glgenframebuffers(1, &_fbo); glbindframebuffer(gl_framebuffer, _fbo);  // associate texture fbo glframebuffertexture2d(gl_framebuffer, gl_color_attachment0, gl_texture_2d, _texture.name, 0);  if (depthstencilformat != 0) {     glgenrenderbuffers(1, &_depthrenderbufffer);     glbindrenderbuffer(gl_renderbuffer, _depthrenderbufffer);     glrenderbufferstorage(gl_renderbuffer, depthstencilformat, (glsizei)poww, (glsizei)powh);      glframebufferrenderbuffer(gl_framebuffer, gl_depth_attachment, gl_renderbuffer, _depthrenderbufffer);     glenum status = glcheckframebufferstatus(gl_framebuffer);        // status here result in gl_framebuffer_incomplete_attachment     glenum error = glgeterror ();                // error here gl_invalid_operation      // checked value of _fbo, 1, , value of _depthrenderbufffer 2      ..... }