Hi Giridhar,
You could use the "find_system" command to find the subsystems/blocks in the Simulink model from the MATLAB command window.
result = find_system('model_name','blockType','Lookup_n-D')
This would find all Lookup Table in your Model and return it in the form of a cell array.
For more detailed information, refer to the documentation : https://www.mathworks.com/help/simulink/slref/find_system.html
I hope this helps.
