When launching some Strategy tools under a Linux operating system, such as System Manager or Command Manager, the following error message may appear in the console:
WARNING: An illegal reflective access operation has occurred

Since JDK 9, accessing private members of classes via reflection is forbidden until proper privileges are defined in the module description file. For compatibility purposes, JVM only exposes warnings about the illegal accesses, instead of banning them.
Since Strategy tools or dependent third party libraries might contain code to access private members of classes via reflection, this leads to JVM displaying the warnings.
Since the warning messages have no impact on the functionalities of the tools, no additional actions are necessary.