Where is 'client' declared? If it is declared inside a function, are you trying to use it inside a different function? That would be "out of scope". If it is not declared at all, that would also be "out of scope".
Where is 'client' declared? If it is declared inside a function, are you trying to use it inside a different function? That would be "out of scope". If it is not declared at all, that would also be "out of scope".