Referencing a function, variable, or class name that compiler cannot resolve.
Kotlin compiler error indicating that symbol `X` is unknown in the current scope or package imports.
Missing package `import` statement, typos in function names, or missing library dependencies in `build.gradle.kts`.
1// Missing: import java.io.File2 3fun main() {4 val file = File("data.txt") // Error: Unresolved reference: File5}1import java.io.File // Add missing import2 3fun main() {4 val file = File("data.txt")5 println(file.exists())6}Simulate standard system builds to trigger compiler trace records and track memory crashes locally.
`File` requires `import java.io.File`. Without importing it, Kotlin compiler cannot resolve the class name.