Exception situation

When an exception occurs, the script result depends on the type of exception.

This table shows the exception types:

Failed	InstructionException	Instruction is invalid.
	ContextException	For example, session not found.
	ScriptResultException	Script result is not assigned to variable.
	WebUiMockException	Interface failure.
	ExitTestException	Caused by ExitTest action.
	ExpressionException
Aborted	InvocationException	Incorrect script argument.
	ConvertException	Type conversion error.
	FileIOException	Failed to load script.
	AbortTestException	Caused by AbortTest action.
	DebugTestException	Debug interface signaled error