After execution i found this error message : *** Warning: No plots have been shown yet. Ignoring call to interactive(). Time-stepping [=======================================================] 100.0%
thanks to help me
If the mentioned example is This you have to remove the line 104. The warning message is due that the interactive() function makes the current plots interactive, then if you are not using the plot() function the message is shown (it's just a warning, the code doesn't break).
interactive()
plot()
thanks for answer