Hi Shiv NileshKumar Matliwala,
I understand that you are trying to convert a vector to bus signal in your Simulink model.
A possible workaround is to use a “Demux” block followed by a “BusCreator” block which will convert to bus signal.
You can refer to the attached model "Vector2Bus.slx" which has masked sub-system and callbacks in conjunction with Simulink command line interface. This converts the vector signal of any size to bus signal.
Hope this information helps to resolve your issue!!