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Where did you print the values?
For example what prints out here for the values of line, wordArr, count, word and hint?


wordArr[count] = new WrdObj(word,hint);


Add a println() statement...

To see what is in the array use the Arrays.toString() method to display the contents of the array.
Usage: System.out.println("URarray=" + Arrays.toString(URarray)); // show URarray's contents
...

What variable at line 41 of the WrdArray class is null? When you find the variable backtrack in your code to see why that variable is null and change the code so it is not null.

If you are not...

does it compile without errors?
If not, please copy and paste the full text of the error messages.

If it compiles, what does it do that is "wrong"? Can you show what it does do and explain what...