Hi Adrian,
I tried the same steps as you mentioned over and over again but I kept getting errors in the source files.
But after removing the apptrk folder and regenerating it from the back up .tar file, I was able to generate the AppTRK.elf file with the same sequence I was trying earlier. Not sure what the problem really was.
Anyways, the problem is solved. Thank you very very much for your support.
Regards,
Rahul