Hi Reshma,
I understand that you are facing "ledblink Failed Code generation information file does not exist" error.
You can refer to the following workaround to avoid this error:
1) Ensure that you are not in a network directory. Change path to a local drive (eg C: drive) and try loading the example again. Alternatively, move the example out of the network directory into a local drive.
2) Make sure that the Arduino you have is not corrupted. Troubleshoot your Arduino outside of MATLAB and see if it works properly before trying in MATLAB again.
