Irrlicht Engine

Vertex shader function usage (D3DDECLUSAGE_TEXCOORD,1) does not have corresponding usage in the current vertex declaration

sometimes my game slows down to 3-4 fps and the dos window shows this error, has anybody encountered such an error or any clues?
-this might be due to normal map usage but it ...

and again:

dMatrix pMatrix;
NewtonConvexHullModifierGetMatrix(collision, &pMatrix[0][0]);
pMatrix.m_up.m_x += 40;
pMatrix.m_up.m_y += 40;
pMatrix.m_up.m_z += 40;

NewtonConvexHullModifierSetMatrix(myShape, &pMatrix[0][0]);

you've released "myShape" , you should only deal with "collision ...

NewtonReleaseCollision(nWorld,myShape);
NewtonBody* myBody = NewtonCreateBody(nWorld, myShape);

i did not look at all but first i saw this , you release "myShape" and create the body with it, you should create the body with the collision you've created:

NewtonCollision* collision ...

okay yea i got it all compiled now.
but it's still not scaling it.

this is what i have:
NewtonCollision* myShape = NewtonCreateBox(nWorld, size2.X, size2.Y, size2.Z, NULL);
NewtonCollision* collision;
collision = NewtonCreateConvexHullModifier(nWorld,myShape);
dMatrix pMatrix ...

create sth. like this:

NewtonCollision* sphere = NewtonCreateSphere(nWorld, 30, 30, 30, NULL);
collision = NewtonCreateConvexHullModifier(nWorld,sphere);
NewtonReleaseCollision(nWorld,sphere);
body = NewtonCreateBody(nWorld,collision);


and modify like this:

dMatrix pmatrix ...

not really you need a new body search about :

anybody doesn't know?
why do the 3dlines disappear when i add particals in any project?

not finished

after adding some particles, lines are only visible from certain angles independent from the location of the emitters.Anybody knows the cause?

Its the title i wrote , vehicle code is Nick_Japans thanks to him
(irrlicht 0.14-newton 1.51)

its in the "Misc" section:
http://www.darkscythe.net

sorry i searched but couldn't find...whatever thanks for the answer, the topic might be useful if anybody searches for a similar problem

i used to have a problem that i couldn't see the 3dlines exactly, what im trying to say, they were not visible from everywhere or their locations were changed and i found out that when i write the code below before calling "draw3dline" everything is ok, anyone knows the reason?


matrix4 mat ...