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NX10.0 Motion Simulation Curve on Curve Constraints

Hi all,


I am currently designing an over head camshaft with the relevant rocker arms. I have used curve on curve constraint within motion simulation to follow the profile of the camshaft once an acceleration has been applied - this works correct in animation. however, once I try to apply two rocker arms and another curve on curve constraint, the solver locks up with the error message "RecurDyn Solver Lockup" and

Error No.1108506 <Simulation> : Solver processing failed. (refer to the *.msg file)


Has anyone came across this before or has any knowledge on how to correct it?

Any guidance would be appreciated