Using access2002, developed application, have split the the application to have the data in a separate file. Now trying to secure the application. followed the instructions the "make mde file" option is available, clicked on that, it looking for a name, have let the system pick one and also have tried picking my own, in both situations the error comes up, Access has encountered a problem and has to shut down, I have chosen to send the problem to Microsoft at that point and other times have not. Access then creates a backup and then shuts down. This happens every time. Anyone know why, or what I'm doing wrong. Is it because the application is split? if so can you tell me how to un split it... haven't found how to do that yet either. I can move the data file and refresh the links to the new location but not un split it. don't know if this is even possible? Any help would be appreciated.