Use Simulate in the Project Menu (or the Run icon) to run the
simulation. It probably won't run correctly first tim. It's often
helpful to put print statements (e.g.
"printf("SCOREBOARD getting request release from unit %d\n", unit_no)") in the entity code to see what is
happening (or, more usually, to find out what is not happening).
As the simulation runs, it generates a tracefile. The default
tracefile file name is <project_name>.sim, stored in a
Results subdirectory. If you want to keep multiple tracefiles, you can
copy the created file to another name in the same directory.