Using play framework 2.4.6. I created a new app using activator. I did nothing else but these instructions here to "Eclipsify" the project https://www.playframework.com/documentation/2.4.x/IDE
This is the error I get
[myapp] $ eclipse
[error] Not a valid command: eclipse (similar: help, alias)
[error] Not a valid project ID: eclipse
[error] Expected ':' (if selecting a configuration)
[error] Not a valid key: eclipse (similar: deliver, licenses, clean)
[error] eclipse
I tried clean, compile I added this line addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0") to my project plugins.sbt file