Run sub VI in another VI

[foudhel]

The problem that the sub vi does not appear when I press the button   

[RavensFan · Accepted solution]

Right click the subVI.  SubVI Node Setup.  You'll get an options dialog.

I would recommend looking at the online LabVIEW tutorials
LabVIEW Introduction Course - Three Hours
LabVIEW Introduction Course - Six Hours

[altenbach]

What does "appear" mean? What does the subVI do? What kind of "button" are you pressing? How are you calling the subVI?

We cannot answer your question unless you explain in more detail. Preferably, attach your code. Tell us how you are running it, what you expect to happen, and what happens instead.