Navigate users to a custom page other than access denied page

rapalaku

It would not work. What I think is,  Actually, the user is redirected to Access Denied Page before running the init script. It means your conditional statement would not work because of access denied page the coreNode id would not be the same i.e. 1234. 

I am not sure it would suit you or not but role-based redirection can be the one option here to achieve this instead of permission setup.