[petek]

It sounds like the styles files didn't get installed properly. Most likely you'll need some guidance from Autodesk to figure out what went wrong, but if you want to try doing some troubleshooting, try this:

Start up Inventor, create a new part model, exit the sketch environment and go to Format menu and Purge Styles... It should give you a dialog with a long list of styles (though you may not see them if they didn't install) and click Yes to All and OK. Click Yes to the Delete Local Styles? dialog (if it comes up).

If all that works, save the file, exit Inventor and then try opening that file. Be sure to open the file from Windows, rather than opening Inventor and then opening the file from Inventor's Open file screen.

Note whether it opens ok or if you still get the error messages.

Next, with that file open, go to the Format:Styles Editor. Under Color you should have Default, Lighting should show Two Lights and Material should show Default. If so, try creating a new color and material, save the style and try drawing something and see if it shows up when you give it your style properties.

Then try saving the file, exiting Inventor and then reopening the file to see if you still get error messages. If it does work ok with the new styles, you would at least be able to do some stuff until you get Autodesk's styles installed properly.