[Note] Zero-length empty base class

For some application, eg., M LiDAR Viewer, I have to set the value of [Zero-length empty base class] and [Zero-length empty class member functions] at [C++ Compiler Compatibility] to "True" ( default are False), or the application doesn't run correct.
Why?

[Reference]
http://docwiki.embarcadero.com/RADStudio/XE4/en/C%2B%2B_Compiler_Compatibility