Look Back Blocking

Description

Look Back Blocking eliminates decisions where the specified attribute in the tail item of the destination region match the corresponding attribute in one or more items following the head item of the source region.

Parameters

This function block has the following parameters:


Parameter	Description
Always Evaluate	Hard, Soft or Breakable. This parameter controls what happens when the extension eliminates all available decisions.
	Hard	All decisions will remain eliminated. Note: When all decisions are eliminated the RCO Output Module, `None`, is executed to handle this condition.
	Soft	Roll back any decisions eliminated by this extension.
	Breakable	The routing modules will first use the danger defined for each individual decision. If no danger point can be found for the decision the site-wide danger point is used.
		TRUE (1)	Roll back any decisions eliminated by this extension.
		FALSE (0)	The decision remains eliminated.
Region	Region to search. If blank, each decision's source region will be searched.
Last Location	Number of locations to look back. Item Class Class of item to compare.
Attribute ID	Attribute of first item to compare. Start Character Starting character of the attribute to be used.
Attribute Length	Specifies the number of characters in attribute to compare. Enter zero in both the Start Character and Attribute Length fields to use all characters.