When I model process like this I can see an error in Alerts window (see below) and it is not possible to build the process.

It should be not possible to add outgoing connection for Compensation Activity. (Toolbox should be disable d for Compensation Activity)

[KBase: defaultKieBase]: unable to parse xml : Exception class java.lang.IllegalArgumentException : A Compensation Activity [_0F9B5BB6-F81D-461E-8B28-DA49AA6F93F0] may not have any outgoing connection [_BD3BE0BF-1883-449D-8916-5938310B894D]