VERY CAREFULLY, check your filenames and paths in your DMB files and ensure that the models_unit files match exactly (minus the .dds part). Next, as suggested, check your EDU file to ensure that ownership matches the DMB (for example, Cohors Imperatoria has both seleucid and slave entries for the DMB and EDU files). The only way it could be a "game" problem is if your executable is corrupt. The UI files are linked to the dictionary (I believe; either way it would be the unit name with the underscores; the other unit name links to the EDB file) line in the EDU file so ensure that your UI files have the correct filename with "info" on the end for unit info folder and the "#" at the beginning in the units folder. Most errors are caused by improper text editing or incorrect files. The invisible officer sword bug, for example is a conflict between the animation used by javelin/pilum hurling units and the fact that the officer unit entries in the DMB file do not have the pilum/javelin skeleton (nor are they meant to) so when the unit hurls the missiles, the officer sword disappears. Keeping working and you will figure out the problem.