2 Replies Latest reply on Feb 8, 2017 7:10 AM by Manuel Caicedo-Rivera

    write doesn't return error for out of paper

    Del Brown

      I expected that if I attempted to write to a printer without paper in it (e.g. it just ran out of paper), that I would get an error from the write command.

      In the below code, no error is logged.  If I set a breakpoint, I am able to verify that writeError is nil.


            let zebraConnection = MfiBtPrinterConnection(serialNumber: serialNumber)

            DispatchQueue.global(qos: .utility).async(execute: {

              if (zebraConnection?.open())! {




                var writeError: NSError?

                zebraConnection?.write(printReceipt.data(using: String.Encoding.utf8), error: &writeError)

                if writeError != nil{

                  DDLogError("Print to zebra errored with error: \(writeError?.localizedDescription)")





      iMZ220 with firmware V73.20.01Z

      link-OS v1.4.957 for iOS


      What is wrong with my approach?