Vertex is not part of triangle Triangle

Troubleshooting
1

Hello,
Is there any way in Blender or JME to fix:

   java.lang.IllegalArgumentException: Vertex 814 : (...here comes the 
    vertex position...) is not part of triangle Triangle{... here come the 
    vertices of the triangle ...}

Or at lest ignore that vertex or something?

2

There is some tricks in blender, search for remove duplicated vertices and select loose geometry.