Watch can't assign multi-dimensional array. Watch fails when trying to 
evaluate a method taking a multi-dimensional array (more than 2 dimensions) 
as parameter. 

Code 
public class Test { 
    private static double foo(double[][][] d) { 
        return 0.0; 
    } 

    public static void main(String[] args) { 
        double[][][] test = new double[2][2][2]; 
        double x = foo(test); 
        System.out.println(x); 
    } 
} 
Place a breakpoint at line 8 (double x = foo(test);) and Debug. Add a Watch 
for foo(test).  Expression fails to evaluate with message "Type mismatch Can't assign