I've been looking for a solution for quite a long time and I haven't come across one that's worked. Morrowind runs just fine, but when I try to run either of the expansions I get a plethora of error messages.


For Tribunal, I receive these messages in order:

Chunk size 10 too big in chunk "WEAT_ID" in form REGN_ID". Max size is 8, data truncated to "#"
DataHandler: unrecognized form. Look in warnings.txt for more info.

The game still runs after I click through these, but I can't trigger the Dark Brotherhood member attacking me.


For Bloodmoon, I recieve these messages in order:

Chunk size 10 too big in chunk "WEAT_ID" in form REGN_ID". Max size is 8, data truncated to "#".
Region 'Felsaad Coast Region' weather chances do not total 100 percent.
Chunk size 10 too big in chunk "WEAT_ID" in form REGN_ID". Max size is 8, data truncated to " ".
Region 'Moesring Mountains Region' weather chances do not total 100 percent.
Chunk size 10 too big in chunk "WEAT_ID" in form REGN_ID". Max size is 8, data truncated to "#".
Region 'Isinfer Plains Region' weather chances do not total 100 percent.
Chunk size 10 too big in chunk "WEAT_ID" in form REGN_ID". Max size is 8, data truncated to "(".
DataHandler: unrecognized form. Look in warnings.txt for more info.

After I click through these messages, the game crashes.


I've tried running in administrator/in different compatibility modes and I've reinstalled the expansions as suggested by many other sites. I would appreciate it if anyone can help me fix this.

That simply means you installed Tribunal and Bloodmoon in the wrong order and you just need to reinstall Bloodmoon to fix it. No need to uninstall anything.

Be aware that if you installed the game to it's default location, you may have other problems. You may not, so wait and see, but in case you do, there's a pinned thread above us with some suggestions for Vista/Win 7.