appengine 1.6.3.1.jar creates Unknown Google App Engine prob

Question

I was using appengine-java-sdk 1.5.3. My web application Project was working fine.

I configured the Sdk and add new sdk 1.6.3

I got many errors in Problem window.

The App Engine SDK JAR appengine-api-1.0-sdk-1.6.3.1.jar is missing in the WEB-INF/lib
directory   lib /project/war/WEB-INF    Unknown Google App Engine Problem

The App Engine SDK JAR appengine-api-labs-1.6.3.1.jar is missing in the WEB-INF/lib 
directory   lib /project/war/WEB-INF    Unknown Google App Engine Problem

The App Engine SDK JAR appengine-jsr107cache-1.6.3.1.jar is missing in the WEB-INF/lib
directory   lib /project/war/WEB-INF    Unknown Google App Engine Problem

The App Engine SDK JAR datanucleus-appengine-1.0.10.final.jar is missing in the WEB-F/lib 
directory   lib /project/war/WEB-INF    Unknown Google App Engine Problem

I tried to find these Jar file.but i didnt see them any where.

someone plz help me to solve this.

Answer 1

Under Eclipse --> Preferences --> Google --> App Engine I had to point to a copy of the App Engine SDK that I had downloaded and installed locally on my computer as opposed to inside of an IDE. Once I did this the errors about these libs not be in Web-Inf disappeared.

Answer 2

You may just need to clean your project. In eclipse, Project -> Clean.