To run simulations you will need to be familiar with the Simulation tools.
Help Topics for Simulating Nets
Errors during Simulation
If an error occurs during a simulation, an error message will appear in a speech bubble.
Limitations
Errors can occur if any of the simulation tools are applied while portions of a net are being syntax checked. It is highly recommended that you do not apply simulation tools while there are any yellow highlights on places, arcs, transitions, pages, or net names.
See more about the Known Limitations in the current version of CPN Tools.