Regarding simulation model output and working

Hlo, my problem is that when i was run the simulation given by sir it was working And same simulation copied and paste to new new model and run it was not working.. what is the problem... Im using matlab 2010a

[Walter Roberson]

You do not give us any information to work with. What happens when you try to run the model?

Copying and pasting a model might not copy the solver settings, and will not copy configuration information.