title: Blender: How to export animation as GLTF file
body: <p>I have made a very basic animation in Blender (2.79) and I am trying to export it as a GLTF or GLB. I have succesfully installed the <a href="https://github.com/KhronosGroup/glTF-Blender-Exporter" rel="nofollow noreferrer">gltf exporter</a> and am able to export both gltfs and glbs of unanimated models no problem.</p>
  <p>As soon as I add animation and try to export however, I get the following error message</p>
  <p><a href="https://i.stack.imgur.com/wToWd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wToWd.png" alt="enter image description here" /></a></p>
  <p>The animation is as about as simple as it could be, I'm just experimenting. Its just the default box that changes location and rotation across 3/4 keyframes.</p>
  <p>I am new to Blender so perhaps I am missing a step but my process is as follows: Add box to the scene, add keyframes (LocRot), go to export as I would with a static object, this has the following (default) settings.</p>
  <p><a href="https://i.stack.imgur.com/P6RSP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/P6RSP.png" alt="enter image description here" /></a></p>
  <p>I have tried clicking <code>Pushdown</code> on the action sheet as I have seen suggested somewhere but it makes no difference.</p>
  <p>Am I missing something? Please let me know if you need any more info in order to advise, I'm happy to share the file or whatever might help.</p>
  <p>NB this will eventually be used in a-frame so any specific tips on export for that would be much appreciated.</p>