Urgent help: Vertex missing weight on skin (BUG?)

Hello,

I'm trying to export a character using the DTS exporter for MAX 9. The problem is that an error arises saying that:

'Vertex 978 missing weight on skin "Mesh"'

- I have tried to move all bones: there is no vertex left behind.
- I checked the weight table and checked that vertex 978 is assigned to a bone with weight 1.
- I have tried the maxscript utility to auto fix vertex weights: some vertices fixed but not the vertex 978.
- I checked the dump file where it says: "Adding weights for bone 4 ("BRoger_Head")"
and vertex 978 effectively is added to that bone: "Vertex 978, weight 1.00000"

But later when it says: "Generating skin "m_Roger".
Vertex, bone, & weight data:"

My vertex seems to be unassigned:

Vertex 977
Bone 0, weight = 0.560, name = "BRoger_Pelvis"
Bone 16, weight = 0.440, name = "BRoger_L_Thigh"
Vertex 978
Vertex 979
Bone 0, weight = 0.180, name = "BRoger_Pelvis"
Bone 1, weight = 0.820, name = "BRoger_Spine"



It really seems a bug in the exporter. I would really appreciate help as it is very important for as to have this working. I would really appreciate ANY idea or help.

Thanks in advance.