Here is the problem. Say that i'm editing a part or an assembly thats included in a top level. Ok, i have the lower level checked out and i'm editing it. When i am done and i check it back in and try to open the top level, solidworks suddenly shuts down. The only way I have found for this not to happen is to have the top level checked out and the same time as i am editing the lower levels. Or, i have to have a colliegue of mine stop what they are doing, check out the top level then check it back in before i can access it. Can anyone help with this please?