Everything was working fine until it wasn't. Saw the following error:

error: Unexpected error. Please report an issue on AndroidAnnotations, with the following content: java.lang.IllegalArgumentException
at com.googlecode.androidannotations.internal.codemodel.JInvocation.arg(JInvocation.java:144)

After repeated attempts it jumped to different parts of the source code for different annoations like @bean and @get.