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If you can't post the full text of the errors you are getting, it will be hard to make recommendations on how to fix the code.

I recommend that you fix the compiler errors BEFORE adding more code...

That is not a compiler error. Runtime means it happened when the code was executing.
What type of exception was it? Can you copy the full text of the error message and paste it here?
Here is what...

Can't say what the problem is without the location of the error. One clue would be what class it is in. Another would be the line of code that is in the error message.

What happens if you use...

Where is the error? At What line in the source?
Please copy and paste here the full text of the compiler's error message.

Please post the full text of the error message that shows where the problem is.