Activity Chart Checks : (C4123) Actual port binding not flowing to/from continuous diagram instance

(C4123) Actual port binding not flowing to/from continuous diagram instance

Error In:
Completeness
Description:
Textual elements, bound to the parameters of a continuous diagram, are not shown as flowing to or from the continuous instance.
Example:
Activity chart A2 contains an instance of a continuous diagram CALC. A data-item is bound to one of the parameters of CALC in the properties of the instance. However, X is not shown flowing to the instance of CALC in chart A2.
Erroneous Elements:
Textual elements