Activity Chart Checks : (C3127) Activities that contain more than one control activity

(C3127) Activities that contain more than one control activity

Error In:
Correctness
Description:
Activities contain more than one control activity, via transparent activities.
Example:
As shown in the following figure, the top-level activity TOP contains a control activity CTL and subactivity A3. A3 is defined within its property as being transparent. The definition chart A3 also contains a control activity CTL_2. The error is generated because activity TOP effectively contains two control activities (because A3 is transparent).
Erroneous Elements:
Activities