My question is while traversing the hash if'err' => '99' is mentioned again, it should just avoid it.
No, because they are in different "sub-hashes". The first "err" key-value pair is in the hash referenced by 'params', while the second one is in the hash referenced by 'par_global'. Two different hashes.

Je suis Charlie.

In reply to Re^5: Remove similar key=value pair from HOH by Laurent_R
in thread Remove similar key=value pair from HOH by vaibhav07

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