How long can a package nesting be?

Question

Java

Hello.
I write in android studio under java.
I'm refactoring code and ran into a problem - how long can a package name be?
for example, I use the Constants class described in package ru.cps.myosm.event.model;
I connect it in another import ru.cps.myosm.event.model.Constants class, which the compiler swears at.
If you reduce the nesting level (for example, ru.cps.myosm.event.Constants ), then everything goes well.
What am I doing wrong or are there nesting restrictions?

Answer 1

problem solved. rebooted the studio and the error was no more

Answer 2

The phrase "the compiler swears" is not appropriate. Show compiler error text