proguard

Currently, I'm having experience that, a piece of code, which makes use of Google Drive API is running fine without introducing ProGuard. However, after introducing ProGuard, I'm getting the following run-time error. at java.lang.Thread.run(Thread.java:856) Caused by: java.lang.NullPointerException at com.google.api.client.util.Types.getActualParameterAtPosition(Types.java:329) at com.google.api.client.util.Types.getIterableParameter(Types.java:309) at com.google.api.client.json.JsonParser.parseValue(JsonParser.java:546) at com.google.api.client.json.JsonParser.parse(JsonParser.java:350) at

I'm using IntelliJ and running Proguard in debug mode but I can't seem to get rid of warnings such as: ProGuard: [MyApplication] Warning: can't write resource [META-INF/MANIFEST.MF] (Duplicate zip entry [android-support-v13.jar:META-INF/MANIFEST.MF]) This project has a couple of modules and android-support-v13.jar is being used on 2 of them. I thought that was the issue so I removed that library from the libs folder, added it as a project library and added the dependency to both modules. That didn't solve anything, the warning persists and I don't understand why. I know these warnings don't