Jeff Hiller
                                                                                                                                                    COMSOL Employee
                                                         
                            
                                                                                                                                                
                         
                                                
    
        Please login with a confirmed email address before reporting spam
     
    
 
                                                Posted:
                            
                                6 years ago                            
                            
                                2 janv. 2020, 10:34 UTC−5                            
                        
                        
                                                    Hello Fernando,
If your file created with version 5.4 only uses features that existed in version 5.3, yes. This thread should help.
Best regards,
Jeff
    -------------------
    Jeff Hiller                                                
 
                                                
                            Hello Fernando,
If your file created with version 5.4 only uses features that existed in version 5.3, yes. [This thread](https://www.comsol.com/forum/thread/163681/save-a-model-as-older-version?last=2018-02-07T12:01:36Z) should help.
Best regards,
Jeff                        
                                                
                                                                                                            
                                             
                                            
                                                
    
        Please login with a confirmed email address before reporting spam
     
    
 
                                                Posted:
                            
                                6 years ago                            
                            
                                2 janv. 2020, 10:42 UTC−5                            
                        
                        
                                                    It's interesting to know such a possibility. Thanks!
According to the thread, one should save the .mph model file as a .java file and then compile it with a lower version compiler. But could a lower version .mph file be recovered from the .java file?
    -------------------
    ZHANG, Pu
School of Physics, 
Huazhong University of Science and Technology                                                
 
                                                
                            It's interesting to know such a possibility. Thanks! 
According to the thread, one should save the .mph model file as a .java file and then compile it with a lower version compiler. But could a lower version .mph file be recovered from the .java file?                         
                                                
                                                                                                            
                                             
                        
                        
                            
                                                                                        
                                Henrik Sönnerlind
                                                                                                                                                    COMSOL Employee
                                                         
                            
                                                                                                                                                
                         
                                                
    
        Please login with a confirmed email address before reporting spam
     
    
 
                                                Posted:
                            
                                6 years ago                            
                            
                                3 janv. 2020, 03:35 UTC−5                            
                        
                        
                                                    Hi Pu,
The compilation process as such should in principle be version independent. It is just a matter of getting a .class file from a .java file.
When you later run the .class file from a certain COMSOL Multiphysics version, and then save the model, the .mph file gets its version number. In principle, you could thus create several .mph file versions from a single .class file.
Regards,
Henrik
    -------------------
    Henrik Sönnerlind
COMSOL                                                
 
                                                
                            Hi Pu,
The compilation process as such should in principle be version independent. It is just a matter of getting a .class file from a .java file.
When you later run the .class file from a certain COMSOL Multiphysics version, and then save the model, the .mph file gets its version number. In principle, you could thus create several .mph file versions from a single .class file.
Regards,  
Henrik