Ok, i already have Morrowind installed but when i go to open data files : master file, it comes up with an error saying. (Trying to load a bad form in TES3file::NextForm.

File = Morrowind.esm

Offset = 7547749

Continue Running Executable Yes/No

then if i press yes it comes up with several messags saying could not create KeyframeManager seqeunce and then dfferent files after it..

Could anybody help with this please?

Errors complaining about NextForm usually indicate that the file is corrupted or truncated. Can you reinstall the game?

I tried re-installing it still not luck. Is it anything to do with the data files? What format should they be in ?