@Victor this one https://www.mysensors.org/build/irrigation ?
In that case it looks like you'll need MySensors 1.4.1. From the sketch:
May 31, 2015
*** Version 2.0
*** Upgraded to http://MySensors.org version 1.4.1
*** Expanded for up to 16 Valves
@Victor You can't expect the community to run and find possible causes of problems with posting only a reference to a sketch. Please use the guideline on how to ask for help.
