When building a client-server application, the client-application needs to be built using the version of 4th Dimension for the platform it will be running on.

For instance, to build a client-application that will be deployed on a Mac OS X platform, the client application should be built using 4th Dimension on the Mac platform. Likewise, the client-application for Windows needs to be built using the Windows version of 4th Dimension.

It is not possible to build the Windows version of the client application directly using the Mac OS version of 4th Dimension and it is not possible to build the Mac OS version of the client application directly using the Windows version of 4th Dimension.