Error in proteus simulation

Hi,

I am planning to do a project of 4-way traffic control system. I am using AT89c51. I have generated the hex file using keil. When i tam trying to simulate the program in Proteus 8 professional, I am getting some errors as shown below
1. Cannot find model file 'ITFMOD.MDF'
2. Missing interface model 'AT89' in U1 #P

Please help mw with fixing this errors

are you using a pre-designed proteus schematic? If yes then check if there is any version mismatch.

Regarding errors:
1. Cannot find model file 'ITFMOD.MDF'
>> Error says the simulation model file is missing. Make sure installation is done correctly. What is the part number you're trying to simulate?
2. Missing interface model 'AT89' in U1 #P
>> Same error as above, either the part in schematic is invalid or schematic is not imported properly. Try to remove U1 from schematic and place it again from component selector.

It would be better if you can zip and attach your schematic file (.dsn) We will be able to help you faster.

Thanks rickey...I have reinstalled version.. Problem got resolved