QTableWidget+QTableWidgetItem trouble

[jpn]

There are 3 places in your code in which you pick an item at certain cell:

...
itemArchive = ui.tableWidget->item(row,0);
...
itemRestore = ui.tableWidget->item(row,0);
...
itemRestore = ui.tableWidget->item(row,0);
...

...
itemArchive = ui.tableWidget->item(row,0);
...
itemRestore = ui.tableWidget->item(row,0);
...
itemRestore = ui.tableWidget->item(row,0);
...

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On the other hand, you have created an item only into cells (0,0), (1,0) and (2,0). If "row" is anything else than 0-2, you'll get a crash. This is most likely the case of yours.