Is there any API limits

Greg, 

Here the code for good measure, I try and setup some reporting from the errors here. I though I was watching it, but looking at this perhaps not. It is a swift function.

func createSharedLink(lePath:String, completion: (string: String?, error: ErrorType?) -> Void) {        

        let request = NSMutableURLRequest(URL: NSURL(string: "https://api.dropboxapi.com/2/sharing/create_shared_link_with_settings")!)

        let session = NSURLSession.sharedSession()

        request.HTTPMethod = "POST"

        request.addValue("application/json",forHTTPHeaderField: "Content-Type")

        request.addValue("path", forHTTPHeaderField: lePath)

        request.addValue("short_url", forHTTPHeaderField: "false")

        request.addValue("settings", forHTTPHeaderField: "requested_visibility\": \"public\"}")

        let nodeA:NSMutableDictionary? = ["path":lePath]

        do {

            let jsonData = try NSJSONSerialization.dataWithJSONObject(nodeA!, options: [])

            request.HTTPBody = jsonData

                } catch {

            completion(string: ", error: error)

        }

        let task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in

            if let error = error {

                completion(string: ", error: error)

                return

            }

 })

        task.resume()