Activity Chart Checks : (C4059) Elements that flow from/to definition without a matching flow in instance chart

(C4059) Elements that flow from/to definition without a matching flow in instance chart

Error In:
Completeness
Description:
There are elements that flow to or from an external activity in the definition chart without matching flow-lines from or to the instance. Note that the elements flowing on the flow-lines are matched, not the sources or targets of the flow.
This check is performed only when you specify with definition charts. The error is reported in the definition chart.
Example:
In the following figure, C is an input to an activity A2 in the off-page definition chart. However, in the chart containing the instance @A2, there is no matching flow.
Erroneous Elements:
Events, conditions, data-items, information-flows, and fields