Hi Mary Rose,
I have Trados 6.52417 and am still struggling with it other than the most subsitence level.
Slightly OT, but build 417 is outdated (even under 6.5), as it was replaced by 18.104.22.1688/439 (and subsequently build 441).
however, it told me that all TUs read were invalid.
What am I doing wrong please?
Could be an inconsistency between the languages of the import file and your TM - perhaps US vs. British English. Check the text file for the language codes "EN-GB" or "EN-US".