Hi I have a situation when it is necessary to receive an IM without a message body. However in pjsua_im_accept_pager this will not be allowed. The scenario is OMA defined so it is not VoIP and I have no problem implementing a workaround, however it would be really nice if pjsip in the future supported MESSAGE messages with empty bodys so that I could use the on_pager callback to process the data. I could not find a reference in RFC3261 or 3428 that says that we should discard MESSAGEs without bodies. Maybe it can be left to the user to decide how he wants to handle a valid MESSAGE without a textual body in the callbacks. Thanks