As Garcilaso said, reinstall as you have missing or corrupt files.

Quote Originally Posted by mrdun
I have a slight bug/ error somewhere I don't know which. Some Iberian generals are wearing blue

edit: I have a screenshot in my tgas file but unfortunately I do not have a program to open them with.
Yep, thats a known bug in 1.5 - A Spanish General uses the Briton model/colour.

Its simple to fix, in descr_model_battle.txt:

1) Find the "Generals, Officers, etc" section
2) Find the "celt_general"
3) Change the ";texture spain" line:

data/models_unit/textures/officer_celt_general_spain.tga

to:

data/models_unit/textures/officer_barb_general_spain.tga