ColladaLoader Unable to add material

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Hello,

When loading a model exported by Blender I get a lot (in the hundrets) of warnings like this:

[Wrn] [ColladaLoader.cc:1747] Unable to add material[Color_243_6379-material]
[Wrn] [ColladaLoader.cc:1747] Unable to add material[Color_243_6453-material]
[Wrn] [ColladaLoader.cc:1747] Unable to add material[Color_243_6103-material]

This appears to slow down loading of the model as it takes a couple of minutes (the model is rather big tough 70 MB).

The model is a collada file.

In the model I can see a color library:

  <library_materials>
    <material id="Color_242-material" name="Color_242">
      <instance_effect url="#Color_242-effect"/>
.
.
.

The color effect is embedded in the very same collada file.

<library_effects>
    <effect id="Color_242-effect">
      <profile_COMMON>
        <technique sid="common">
          <phong>
            <emission>
              <color sid="emission">0 0 0 1</color>
            </emission>
            <ambient>
              <color sid="ambient">1 1 1 1</color>
            </ambient>
            <diffuse>
              <color sid="diffuse">0.0864 0.0864 0.1488 1</color>
            </diffuse>
            <specular>
              <color sid="specular">0.25 0.25 0.25 1</color>
            </specular>
            <shininess>
              <float sid="shininess">255</float>
        </shininess>
        <index_of_refraction>
          <float sid="index_of_refraction">1</float>
        </index_of_refraction>
      </phong>
    </technique>

So my questions:

1.) Can searching for the material slow down loading 2.) Does anybody see the mistake I did? Can we get the material get loaded? Where sould they be? 3.) Can I force ColladaLoadar to ignore the material information?

BR