es por tener muchas ventanas?
There are all sorts of reasons why a compilation can fail - some on the MIT Server side (we have had MIT Servers failing this week) and some on the User's side, either their broadband connection being glitchy, an anti-virus program interrupting the process or yes indeed, something wrong with the Project itself.
How many screens does your Project use?
ProfessorCad: Tips & Tricks Cannot Build/Install/Run APK