The type 'java.util.AbstractList' is defined in an assembly that is not referenced (Converted weka.jar to C# dll via IKVM)

I am using weka api through c#. I have converted weka jar file to c# dll by using ikvm. Then I have added the converted dll(wekacsharp.dll) in my reference. I have also added ikvm.gnu.classpath.dll in my reference. I am trying to use j48 algorithm but i am getting the error. Screen shot of code and error lists are attached. Kindly check it and sugeest me something to remove these errors. Thanks!