Creo 2.0 Measure Mechanism

Hi,

I am a student who needs some helps! I am working on a project of design/simulation on Creo. I am trying to simulate my system, which is the following:

Two blacks cylinders pull on the yellow part, which rotates relatively to green part. Yellow part pull on grey part so as to return it, thanks to blue parts. A load is applied between the two brown slabs (blue arrow=force). I want to know the force needed by the cylinders so as to return the vertical load applied between to brown parts. To do that, i created an analysis definition in which i apply the move i want (turn of the load).

Then, I created a new measure like this:

Connection_7 corresponds to the link between piston and cylinder. The goal is to know the force in this joint.

However, it does not work:

Firstly, when i want to simulate, i see this message:

Then, once i click ok, i cant see any graph and the measure results window is like:

I precise i applied gravity and materials to all components.

Can someone help me? i am a bit lost.

Thanks a lot

BR