Deleting password returns false but no error #190

Im trying call the
SAMKeychain.deletePassword(forService: String, account: String, error: NSErrorPointer)
but it returns false and the error pointer is nil.
Any suggestion on how to figure out whats wrong?

this is my implementation:

let error:NSErrorPointer = nil
let v = SAMKeychain.deletePassword(forService: service, account: Key.account, error: error)
return (v,error?.pointee)