what is the meaning of?
<E> Invalid PDU message type: -104
<E> Invalid PDU sender:
<E> Invalid PDU transaction id:
RE: what is the meaning of?
You have an error because the "From" or "Message ID" of your message may be missing or formatted incorrectly.
Make sure that, when sending to MSISDN, your phone number includes the type. For example:
Refer to the "MMSC EAIF Emulator User's Guide.pdf" that came with the Emulator for more examples. Or Section 8 of the WAP-209-MMSEncapsulation document.