In Appendix of the AT Command Interface Guide 6.61 in section 1.1 there is no reference that +CME ERROR: 30 may be resulting from the command AT+CCED.
Either it should not, then maybe there’s a firmware bug, or this command should also be listed…
See also:
http://www.wavecom.com/modules/movie/scenes/forums/viewtopic.php?t=1143
Best Regards,
Jan