Activity Chart Checks : (C4147) Complex Data elements not defined by User-type

(C4147) Complex Data elements not defined by User-type

There are data elements defined directly as Record, Union or Array of non-primitive type (not Integer or Real), and not by User-defined types.
Error In:
Completeness
Erroneous Elements:
Data-items, Conditions, Record or Union fields, Subroutine parameters and local-variables