Overcome the runtime error from Widening Cast

Good Afternoon.
I created a Super class and Sub Class.
I created an object for super class reference variable.
Then i pass like this.
sub ?= super.
Then call the Super Class emthods by using Sub class reference variable.
Then press the Execute button.
Then it goes to the DUMP.
While i am using Narrowing Cast then it is working Properly.
But for the Widening Cast only it is taking the problem. It goes to the dump.
In BSP Widening cast working properly.
For my program why it is going to dump.
How i over come that DUMP.
Is there any Exceptions or give me the reson why it is going it dump. how i will solve that problem.
Give the data on above problem with screen shorts if possible.
Thank you.
B. Krishna.

Hi Krishna,
You can down-cast(widening cast) a class ref variable into its sub-class' class ref variable only if you have already done an up-cast(narrowing cast) of sub-class' class ref variable into the super class' class ref variable ....
that is
sub ?= super.
is possible only if
super = sub.
was already done...
If u r getting MOVE_CAST_ERROR error, this could be the reason...
~Jose

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main()
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jclass cls;
jmethodID mid, mid2;
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Not sure about your comment...
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