Saludos cordiales, por favor su ayuda no puedo generar mi apk, desconozco el error , es la primer vez que me pasa
There may be many reasons for this.
- project size too large (too many files added to the project - max 30MB)
 - too many screens (max 10)
 - too much, too long blocks
 
after doing a search in the community like this Search results for 'DX execution failed' - MIT App Inventor Community you could have found the following thread
Taifun
Trying to push the limits!         Snippets,         Tutorials and        Extensions from        Pura Vida Apps by 
  Taifun.
              
              
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