At the moment if the called program does not behave as expected (either the callee does not exist or it returns an error), nothing is noticed, the LINE variable gets constructed with nulls.
At the moment if the called program does not behave as expected (either the callee does not exist or it returns an error), nothing is noticed, the LINE variable gets constructed with nulls.
At the moment if the called program does not behave as expected (either the callee does not exist or it returns an error), nothing is noticed, the LINE variable gets constructed with nulls.