Sudhir,
I think I have seen similar errors when I implemented user hooks years ago. I think the standard package ends up calling custom package and mismatch in parameter list. As Gavin says, find the invalid package and try compiling it. There are a couple of standard API's to maintain hooks: hr_api_hook_call_api, hr_api_user_hooks_utility.
Logically following the error message you could think that if you created hook, std package was patched, then you need to re-run pre-processor. Or knowing Oracle, error actually has nothing to do with hooks, just some patches are inconsistent.
Regards
Ian