[SOLVED] "triggeringItem" null for system started

[rossko57]

rule "Clock tick"
when 
	Time cron "0 0/1 * * * ?"   // each minute
then
	if(triggeringItem===null) {
		logInfo("testit","Surprise")
	}
end

Error during the execution of rule 'Clock tick': The name 'triggeringItem' cannot be resolved to an item or type; line 12, column 5, length 14

For completeness,
if(triggeringItem===null && triggeringItem.name=="blah")
throws the identical error (nothing about name)

triggeringItem is working as designed, as described here

Features for Rules that work with Groups

Introduction This post provides an overview of two features that have been added to openHAB recently to make it easier to write rules that work with groups of items. These features only apply to rules defined in .rules files (also know as DSL Rules), and not any other types of rules/scripts such as those for the Experimental Rule Engine or JSR223 Scripting. The following sections will provide examples of the usage of each feature. These examples will be based on the items shown here. Group All…

I think there has been some mixup about what code provoked which failure.