Hello all!

I have an issue about simulation of instances of a model. My system is composed by several blocks with multiplicty * and interfaces between them. It is a generic model. I have created an instance of the system where two instances of the same block type interact with a third one by sending data to the latter doing changes of states (in a state machine). The problem is that the simulation ends differently every time I run it. Sometimes the instance in the third block correctly receives the data from the other two, however other times it only receives one (randomly) or none at all. It seems that the speed of the simulation influences the result.
How is this usually solved?

Thanks!!