Hello, 
   	  
   	I make a transient magnetics 3D model. Around the moving part I make a box with compressible area, like in the user guide: file:///mnt/nfs/clients/CAE/Flux/Flux12.3/Help/Flux/english/Website/index.html?FluxGuideDutilisation1 
   	Is it necessary to make, in the modeler Context, an assembly between the moving part and the box with the compresible area? Because without I didn't get any force as result.  
   	Or is the result with the assembly therefore falsified? 
   	  
   	Thank you in advance.