CME ERROR and CMD ERROR

I don’t know if this the right forum, but I have a little problem.

I use a wavecom integra 2106B, that is a GSM/GPRS modem that I use to connect my “box” to a server over TCP/IP.

Sometimes, when I initialize the comunication with this modem via at command I receive some error code (CME ERROR o CMD ERROR),
but I have 3 error that I don’t what is it, because are undocumented.

This errors are the numbers (in decimal representation) : 29440, 6, 5168

I don’t know if this error is CME ERROR or CMD ERROR, because in the log stored in my “box” these error is saved identically.

Thanks for support.

Bombaci Paolo
Signal s.r.l.