Does autocad have to be installed sequentially by year. Our IT guy in setting up a new computer and he is just f'ing everything up. He is installing Different versions of Autocad in random order. C3d11, LDT06, LDT09 and so on. We are getting so many differnet errors in ldt09 it's crazy. I've never had this problem but all of a sudden we do and this is all i can think of. I've always done them in order.