Hi Guido, if you just try to remove the using block for the alert? I had the same problem and it was solved in this way. -- View this message in context: http://monotouch.2284126.n4.nabble.com/SIGSEGV-while-executing-native-code-tp3881741p3881780.html Sent from the MonoTouch mailing list archive at Nabble.com.