Error messages

hi…quick question…where in the manual can i find information about error messages… tce error messages…

like this…was able to make a copy of my dvd with dvd decrypter but not clonedvd…dvd has no protection…

with clonedvd i received the following tce error message…
what does it mean…?

Module 1 navigationpack.cpp 291 TCE

if someone could answer that and point me to the right spot in the manual i would be extremely grateful…