Activity Chart Checks : (C13005) Either ‘get’ or ‘release’ are operated on non-resource elements

(C13005) Either ‘get’ or ‘release’ are operated on non-resource elements

Error In:
Design
Description:
There are Conditions, which are used with the operators get (gt!()) or release (rl!()), without being defined as Resources in their Design-Attributes.
Erroneous Elements:
Conditions