This tool is used to precise whether the debugger stops or continues on specific exceptions.
To show this tool, go to menu : Debug > Exception handling .
Note: now that exception are object in Eiffel too, the mechanism is unified for classic and dotnet system using the Eiffel exception class names.
Exception handling dialog
If the "filter exceptions" is enabled, for each exception you can leave the exception action as Disabled (default behavior: catch), Catch (stop on such exception), Ignore (do not stop on such exception). By double clicking on the exception name you toggle Ignore/Catch.
In the following picture, we stop on every exception except the "External Exception".
Using the "Pattern" field, you can add you own filter using regular expression.
Cat call detection during the execution
This dialog also provides a way to disable/enable the cat call warning on the console or in the debugger with the first two checkbox fields.