What are the possible issues that will arise while upgrading windchill on RHEL?

Hi All,

I wanted to know what are the possible issues that will arise while upgrading windchill on RHEL? I have done multiple successful upgrades on Windows server but trying it on RHEL for the first time. I have experience working with RHEL and Windchill but never tried upgrading. If anybody has done Windchill upgrade on RHEL please let me know if you have faced any issues during upgrade.