The condition to be evaluated must control the activities performed by the user that the user may impact; otherwise he will not be able to move to the next task. The procedure associated to this property must have the following parm rule:
parm(in:&wfprocessdefinition,in:&wfprocessinstance,in:&wfworkitem,out:&conditionalCode);
Where the variables are defined as follows:
&wfprocessdefinition - WorkflowProcessDefinition
&wfprocessinstance - WorkflowProcessInstance
&wfworkitem - WorkflowWorkitem
&conditionalcode - Numeric(4.0)
Then when the variable &conditionalCode has two possible values, 1 and 0. The 1 value indicates the condition is not matched.
Message: Message triggered when the post condition is not matched.
Procedure to evaluate the conditions, it will be executed when moving to the next task.