Error when calling function from package body? (Oracle)

Hi,

Has any of you tried to call a function from a package body into grid application?

I don’t have problem when calling a function, but if the function is within a package body, it said that it’s a valid identifier.

No problem with this:

select id, function_name(param1) as name from table_1 

But problem with this:

select id, package_body_name.function_name1(param1) as name from table_1 

The package is valid. And I have tried in sql builder.