Thanks for the reply. You are correct
When we are sourcing the .ksh file in .bashrc, it was not able to source the .ksh file properly because of the improper folder name chemkinpro.linuxx8664. This folder is generated automatically while installation. I changed the folder name to chemkinpro_linuxx8664, then updated this folder name where ever required in scripts and now its working fine.
Thanks again for the help and support