Use Preload CLR (-preloadCLR) to load the .NET Common Language Runtime (CLR) and any specified assemblies into the ABL session at startup. This provides for deterministic loading of the CLR and assemblies when the application is started.

If you do not specify -preloadCLR, the AVM loads the CLR the first time ABL refers to, or uses, a .NET type or object either at compile time or runtime. All of the assemblies listed in the assemblies.xml file are loaded at once.

If you specify -preloadCLR and the client machine does not have an appropriate version of the .NET framework installed, OpenEdge raises an error and shuts down.

For more information about accessing .NET objects using the ABL, see Use GUI for .NET Objects in ABL Applications. For information about the .NET CLR, refer to the Microsoft .NET Framework documentation.