Map Maker and Arc GIS can play up from time to time.
The usual causes are:
- You have tried to load a corrupt data set
- You are trying to view or link to a very large data set / database
- You are performing a complex operation on a very large data set
That said, both programs will throw inexplicable errors from time to time. If you get repeated errors try:
- Closing the program and starting it again
- Restarting the Workstation / PC
If neither of these resolves your problem, and you cannot open the program, it may need reinstalling.
Otherwise you can try and
- Simplify your project by reducing the number layers, the linked databases
- Start the project again