I wouldn't worry about that warning now. If you do

Log.d

before the whole

RxTextView

part, can you see that printed to logcat?

@arekolek yes

You can add

.doOnNext { Log.d(TAG, "skipInitialValue: $it") }

after

skipInitialValue

and so on after subsequent operations and see what happens

private val lengthGreaterThanSix = ObservableTransformer<String, String> { it.map { it.trim() } .filter { it.length > 6 } .singleOrError() .onErrorResumeNext { if (it is NoSuchElementException) { Single.error(Exception(“Lenght should be more than 6”)) } else { Single.error(it) } } .toObservable() } private val verifyEmailPattern = ObservableTransformer<String, String> { it.map { it.trim() } .filter { Patterns.EMAIL_ADDRESS.matcher(it).matches() } .singleOrError() .onErrorResumeNext { if (it is NoSuchElementException) { Single.error(Exception(“Email is not valid”)) } else { Single.error(it) } } .toObservable() }