Hello,<br><br>  I am a new user to VTK and trying to install a VTK extension for 
MATLAB - matVTK. When I am displaying the volume data, MATLAB crashes.<br><br>The error message is in display window as 
follow,<br>
&quot;ERROR: In E:\Download\vtk-5.6.0\Rendering\vtkOpenGLExtensionManager.cxx, line 341<br>vtkOpenGLExtensionManager (051B91B8): Extension GL_VERSION_1_2 could not be loaded.&quot;<br clear="all"><br>But I used glew to check that my graphic card does support GL_VERSION_1_2.<br>

<br>GL_VERSION_1_1:                                                OK <br>---------------<br><br>GL_VERSION_1_2:                                                OK <br>---------------<br>  glCopyTexSubImage3D:                                         OK<br>

  glDrawRangeElements:                                         OK<br>  glTexImage3D:                                                OK<br>  glTexSubImage3D:                                             OK<br><br>GL_VERSION_1_3:                                                OK <br clear="all">

<br>Could someone tell me how should I fix? Is there something I have done wrong? Thanks a lot.<br><br>And
 one more question, when I build VTK, should I link it with OpenGL in 
Visual Studio? How could I do that? Thanks a lot for explanation.<br>-- <br><br>Yuanming<br><br><br>