Error: Execution Failed for Task ':App:Clean'. Unable to Delete File

Error: Execution failed for task ':app:clean'. Unable to delete file

After I posted a bug report to the Kotlin bug tracker, I was notified of Issue 61300 on the AOSP tracker. That seems to be the cause. Since there's nothing I can do at the moment, I'll mark this question as answered, and I'll update the answer if the bug is fixed.

In the meantime, if you're running Windows, I believe I've found a workaround. You'll need to download LockHunter (at your own risk of course), then add the following to your module's gradle.build file, replacing the lockhunter variable with your path to LockHunter.exe:

task clean(type: Exec) {
    ext.lockhunter = '\"C:\\LockHunter.exe\"'
    def buildDir = file(new File("build"))
    commandLine 'cmd', "$lockhunter", '/delete', '/silent', buildDir
}

This causes LockHunter to forcefully and silently unlock and delete the build files when the app:clean task runs.

Projects continuously fails to clean because of fail to delete file

I'll post the solution to my own question because its worked for me and may help others in the future.

No matter what, my file would not allow me to delete it, regardless of administrative privileges.

By renaming the file, Android Studio identified the file as 'missing' and regenerated another build file. This then allowed me to rebuild and clean my project.

It now works again!

Error: Execution failed for task ':app:clean'. Unable to delete file

After I posted a bug report to the Kotlin bug tracker, I was notified of Issue 61300 on the AOSP tracker. That seems to be the cause. Since there's nothing I can do at the moment, I'll mark this question as answered, and I'll update the answer if the bug is fixed.

In the meantime, if you're running Windows, I believe I've found a workaround. You'll need to download LockHunter (at your own risk of course), then add the following to your module's gradle.build file, replacing the lockhunter variable with your path to LockHunter.exe:

task clean(type: Exec) {
    ext.lockhunter = '\"C:\\LockHunter.exe\"'
    def buildDir = file(new File("build"))
    commandLine 'cmd', "$lockhunter", '/delete', '/silent', buildDir
}

This causes LockHunter to forcefully and silently unlock and delete the build files when the app:clean task runs.

Unable to clean project in Android Studio

I had the same problem.

You need to go to the source file directly.
Close the studio and go to the path the issue is located at and delete the folder there.

Dagger 2 error Execution failed for task ':app:kaptDebugKotlin'

finally i found that question in stack overflow and work for me, thanks

Cannot find DaggerAppComponent inside Application class

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