proc

i am programming in proc.
i have a local variable 'ls_date' inside a function. and using that inside a PL/SQL block in the same function.
It's erroring as "Identifier must be declared".
but the same program is working when i declare the variable 'ls_date' with global scope.
what's the reson behind this?

You might be refering it some where else for sure.

but that variable is not referred outside the function.
We tried to figure out the reason. but we changed that variable as global and its running fine now.