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I found the cause of the error 'La référence d'objet n'est pas définie à une instance d'un objet.'. It is caused by a bug in the handling of the 'BasicTextMode' compatibility mode of the GSM Modem Gateway. We will fix that in the next version of Diafaan SMS Server.

'BasicTextMode' should only be used with modems or mobile networks that do not support PDU mode, the implementation of SMS text mode in Diafaan SMS Server is very basic and a lot of SMS options are not available in text mode. Usually it is best to use only the 'Enhanced' or 'Normal' compatibility modes.

When I look at the communication logs of your two modems it seems that your mobile operator only accepts numbers in local number format (06...) and not in international number format (+336...), usually it is the other way around. Diafaan SMS Server uses the international number plan as the default because that works best for most networks but in your situation you might have to set the 'DefaultAddressType' property in the advanced settings of the GSM Modem Gateway to 'National' and use the local number format (06...) only when you send the messages. You can use the Number template option in Diafaan SMS Server to convert the numbers from one format to another if necessary.

Regards, Henk

Thank you for the logs. The error "'bonjour' is not a valid SMS PDU Data field" is caused by the way that you are sending the message. You are using the message type 'sms.binary' or 'sms.pdu' and if you use this message type then you have to encode the message to hexadecimal digits yourself, 'bonjour' is not a valid hexadecimal encoding of (a part of) the message PDU. You can find more information about binary messages in the online manual.

In the communication log of the modem I see that the modem returns CMS error 512 after Diafaan SMS Server tries to send the message. This is a manufacturer specific error that unfortunately does not explain anything about the underlying cause of the error. I do not see any clear reason in the log for this error.

I found a reference to this error for the FXT100 modem on the internet where the problem was that the modem did not connect properly to the mobile network when the quad-band mode was selected. The solution appeared to be to set the modem in dual-band mode with the AT command 'AT+WMBS=4,1', 'AT+WMBS=5,1' or AT+WMBS=6,1' (depending on your network). You can use AT command 'AT+WMBS=7,1' to set the modem back to quad-band mode.

Regards, Henk