Correction to my previous post. The message was not sent twice.

It was a concatenated message (2 sms).

Most of the attempts, 2 sms were sent successfully.

When we received NullReferenceException, only 1 of the sms were sent successfully.

In addition, I have just discovered that one of the messages that received a NullReferenceException was sent twice.

This is quite a bad issue for us.

Hello, I have checked and the messages are being delivered, but we still receive a NullReferenceException. SourceAddr: SEED ShortMessage: 'SAVE THE DATE' - Sunday 9th March 8:30pm - Mr Steve, international author and lecturer will be doing a pre Fest talk - 'Fest - behind the mask' at 6 Old Hall Roa...

Any feedback?

I also get this System.NullReferenceException: Object reference not set to an instance of an object. at Inetlab.SMPP.Common.SmppClientBase.SendPDUAndReturnResponse[TResponse](SmppPDU pdu) at Inetlab.SMPP.SmppClient.Bind(Bind pdu) at Inetlab.SMPP.SmppClient.Bind(String systemId, String password, Conn...

Hi, I just tested your component to send out a bulk SMS. I received this exception a number of times. System.NullReferenceException: Object reference not set to an instance of an object. at Inetlab.SMPP.Common.SmppClientBase.SendPDUAndReturnResponse[TResponse](SmppPDU pdu) at Inetlab.SMPP.SmppClient...