Morrowind alone works fine, but if i try to play with either one of the expansions i get these errors.

1. Felsaad Coast, Moersing Mountains, and Isinfier Plains region weather chances do not equal 100 percent.

2. Chunk size 10 too big in chunk WEAT_ID in form REGN_ID max size is 8 data truncated to "." Then this is repeated 3 times also with these data. "(" and
"#".
After that it crashes and i cant play the tribunal/bloodmoon expansions. Can someone please help i would greatly appreciate it. Thank you.

Sorry i made a new post but i couldnt edit those last words. Anywho, i also get those errors when trying to open up bloodmoon/tribunal in the construction set, followed by alot of dialogue errors. Does this mean i will never be able to play on tribunal/bloodmoon? Or is their a patch to fix all this trouble?

I am no expert on this stuff, but if I had just started using the programs and was getting those error messages, my first response would be to re-install Morrowind and the two expansion sets. It is important that they be loaded in the right order (Morrowind, then Tribunal, then Bloodmoon), so that all of the right files get replaced along the way and you end up with the latest version of every file.

If the programs were running fine in the past and then just started giving you errors all of a sudden, then some change that was made might have triggered the problem. Have you previously made any changes in the Construction Set, or installed any mods? If so, and if Morrowind and the expansions were working okay in the past, you might try backing off those changes to see if that fixes the problem. Sometimes mixing multiple mods can create conflicts that result in errors.