Errors in Blender

[Spinell]

I'm having two errors: one inside blender, the other comming from the mesh uplaoder in SL:

 

*In the uploader, the mesh doesn't load and I get a message "error: dae parsing issue - see log for details"

*In blender, when I parent the mesh to the armature (auto weights), I get a message saying they couldn't find weight selections for all the bones, but the mesh tiself didn't have any vertex groups assigned. In the uploader, it doesn't show when I select the preview weights option.

 

....Help? ^.^

[Codewarrior Congrejo]

Hm, 

Does the same thing happen when you try to parent a new testmesh to the armature?  (just somesthing simple as a cube or sphere)

if it does that would indicate that there is something wrong with the armature. Unless there are maybe still some interfering vertex groups in the mesh.

Check in the Data properties panel of the mesh if there are any vertex groups left, delete all of them, unparent the mesh and delete the armature modifier and with the clean mesh parent it new to the armature with autoweights. 

If that doesn't fix it - you can if you want  - send me the file and i'll have a look at it. (sending you my mailaddi via PM here in the forum) it's easier to see what could be the troublemaker especially when it would be the armature - when looking at the file.

[Gaia Clary]

This sort of errors can happen when your mesh has no clean topology. It may happen under following circumstances:

 

1. You have collapsed edges or collapsed faces in your mesh fix: remove doubles
2. You haveduplicate vertices, loose edges or vertices or fully intersecting faces fix: remove loose verts/edges
   
3. Your mesh consists of multiple meshes which partially intersect or even meshes inside of meshes. fix: consider to redo parts of your model and make "cleaner" meshes
4. Your topology is non manifold (you have edges which belong to more than 2 faces) I believe this sort of topology error is the main cause of such weight issues. fix: avoid non manifold meshes.
5. sometimes the problem is related to modifiers (mirror modifer, solidify, less often subdivision). fix: try to remove the modifier(s) before weighting, and add them back later.

Actually Blender's weight tool does not always fail. And whenever i have seen this error when inspecting meshes, i could see at least one of the above issues on the mesh, often multiple issues, almost ever non manifold meshes.

The problem could go away when you do minimal changes on your mesh, often unrelated to the areas where the mesh is obviously not clean.

On the other side i never have seen this problem with clean mesh topology.