It's hard to tell somthing, if the model is not available.

Actually the right postion of noEvent should help.
Also a propoer solution for such effects is to insert a hysteresis for
the switch parts.

so long.
Willi

Willi thank you very much for your reply.

I will try to post some something later today, so I can give you  a better impression .

Thanks

Wili unfortunately I cant give specific code because of my thesis' confidentiality however I can describe the following:

My model comprises of the following components:

-world coordinate system                                                                                       ((connected to prismatic joint))
-prismatic joint (allowing movement only in x axis)                                           ((connected with bottom frame of body cylinder))
with flange axis enabled, having a parallel spring damper connected on top.

-body cylinder                                                                    ((connected on its top frame with  loading component))

-loading component for external load application, containing the velocity of the cylinder in the form of:
__________________________________________________________________________________________-
(A)=(constant(<-0.01-0.05) - cylinder_velocity)*constant

if A <0 then
B=0
elseif A >=0 and A <= 2 then
B= constant + constant*A^2- constant*A^3....
else
B=constant
end if;
Load=B*constant;
____________________________________________________________________________________________

The above load model is connected to the main model, where there is the  equation   cylinder_velocity=der(prismatic.s) or prismatic.v[1]  and this is how the coupling happens.
If you have any suggestions of what kind of guard or function i should apply and where, it is more than welcome.
With euler it gets solved but it is really sensitive to the interval length and create many state events.
I dont yet know if this is normal or not(the state events)  for the specific modeling.

Thanks