Failed to transform file '45907c80e09917e1b776adf038505958' to match attributes {artifactType=jar} using transform AarTransform

Question

I am using Android 3.0 canary 4 and making an app. Everything was working fine until yesterday, but today when i opened the project, it gave me an error

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Answer 1

Received similar error:

Failed to transform file 'uat-release.jar' to match attributes {artifactType=android-classes} Transform output file D:\R\project\uat-release.jar does not exist.

In my case, Actual file was aar and bymistake I put .jar in build.gradle(of uat-release module)

  configurations.maybeCreate("default")
  artifacts.add("default", file('uat-release.jar'))

Solved it by correcting file type:

  configurations.maybeCreate("default")
  artifacts.add("default", file('uat-release.aar'))