In the tree on the left under Tasks you can find the entry called Time
Course. Selecting this entry in the tree will bring you to the time course
settings dialog.
Before we can calculate the actual trajectory, we have to specify a report
definition to use for the output and a filename for this report definition. To
do this, you have to click on the "ReportDefinition"
button at the bottom.
In the dialog that pops up, you choose the report definition that you created
in the last step and specify a file name in the Target field. You can either
type the filename, or browse the file system by clicking the "browse"
button.
When you are finished, click the "confirm"
button.
You are now ready to calculate the time course by clicking the "Run"
button at
the bottom of the Time Course dialog.
To verify that copasi really did calculate something, look at the file you just
specified, it should now contain the data of the time course simulation.