Hi Shankari,
Thank-you for responding to my question.
Yes, it is precisely the file:
OMAP-L138 & C6748 LC Dev Kit Ver A6a
which requires a password when you try to unzip it. I just repeated the download and again attempted to unzip it. I made a screen capture of the request for password but I do not see any way for me to attach that image file to this post. Here, I posted the screen capture image file on a web page so you can see the password request. Just click the link below:
http://dat7.com/texasinstruments/Password_Required_TI_L138.png
Thank-you for your help.
All the best,
Robert