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### 17.4 Exception handling nesting

It is possible to nest Try...Except blocks with Try...Finally blocks. Program flow will be done according to a lifo (last in, first out) principle: The code of the last encountered Try...Except or Try...Finally block will be executed first. If the exception is not caught, or it was a finally statement, program flow will be transferred to the last-but-one block, ad infinitum.

If an exception occurs, and there is no exception handler present which handles this exception, then a run-time error 217 will be generated. When using the SysUtils unit, a default handler is installed which will show the exception object message, and the address where the exception occurred, after which the program will exit with a Halt instruction.

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