PLS-00225: subprogram or cursor 'string' reference is out of scope

Hi,all:
  When I connect Oracle database with a user(such as wxy/wxy),and then in the declare part of my procedure,I make the following definition: ('test':a name of schema;'courses'is name of a table in schema'test')   rec test.courses%ROWTYPE;
it is ok,but when I connect database as another user such as (king/king) and make the same definition,I got the error:PLS-00225: subprogram or cursor 'string' reference is out of scope ,Then why?Does the user 'king'need to be granted any privilige? what privilige?

Thank you in advance!

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