Flow Chart Checks : (C19002) Either ‘send’ or receive’ are operated on non-message elements

(C19002) Either ‘send’ or receive’ are operated on non-message elements

Error In:
Design
Description:
There are Data-Items, which are used with the operators send (sn!()) or receive (rc!()), without being defined as Messages in their Design-Attributes.
Erroneous Elements:
Data-Items