Program crashing on import objects

[dudantas]

The program is crashing when it tries to import many items, I tested it with 250 and it crashes.
With 100 it normally import.

Furthermore, I would like to know if there is the possibility of increasing the number of objects shown in the list, the maximum currently is 500, but I believe there should be an option to be able to show all items (this would make it easier to export the objects).