Activity Chart Checks : (C4139) Elements that flow from/to instance without a matching flow in descendant chart

(C4139) Elements that flow from/to instance without a matching flow in descendant chart

Error In:
Completeness
Description:
There are elements that flow from or to the instance activity without matching flow-lines to or from an external activity in a descendant chart.
This test is similar to C4058, but is reported when working in “Non-Strict External-Activity Resolution” mode, or when the regarded flow-lines pass through routers.
Erroneous Elements:
Events, conditions, data-items, information-flows, and fields