Activity Chart Checks : (C4011) Elements that could be defined lower in the hierarchy of charts

(C4011) Elements that could be defined lower in the hierarchy of charts

Error In:
Completeness
Description:
Textual elements explicitly defined in the tested chart are used only in other charts, and could be defined lower in the chart hierarchy without changing the resolution results. The lowest chart in which these could be defined is the lowest common ancestor of all the charts in which references to this element exist.
Example:
Consider the following hierarchy of charts:
An element defined in SMS_SYSTEM but used only in PERFORM_RELEASE_GEN and its descendants should be defined in PERFORM_RELEASE_GEN.
Erroneous Elements:
Textual elements