This is a bit like "I know how to make a phone call using a phone, but I'm not allowed to, so how can I make a phone call be only using a coffee mug?"

Quite a good example...

No, the source of your problem still is that you're not allowed to touch outdated/broken software. Find a way to lift that restriction.

This is very old code and I work for some company. No one doesn't take on himself to permit such a change... I am already got a negative answer when I try to do the change and asked to fix a problem without changing the core ...

I need to find some backdoor way to solve that... I need a help ...