help with Eclipse Memory Analyzer [MAT]

I tried using M开发者_Python百科AT as per this link but dont see (.hprof) file generated anywhere after running the code. I used the -XX:+HeapDumpOnOutOfMemoryError in config arguments as mentioned.

Any specific permissions etc I need to get it working ?

P.S: For context on why I am using the mem analyzer please check the question here:

I had an older version of MAT installed. I installed the newer one and it worked fine in eclipse. thought the older version shld also have worked imo

No special permissions are needed.

I've created a simple class:

public class A {

    public static void main(String[] argv) {
        String a = "3";
        while (true) {
            a = a + a;
        }
    }
}

Then compiled it:

javac A.java

And then ran it:

java -Xmx1m -XX:+HeapDumpOnOutOfMemoryError A

and got the dump file (.hprof).

How does it differ from your procedure?