Hi Deepak,
I have created the users orasid and sidadm prior and gave both their unique UID and GID on the central instance and the db instance. I use root as the user for executing SAPINST. The UID is consistent with the user sidadm and and owner of the directories are sidadm:sapsys. I'll keep checking..not sure what else to change if the UID is set to the right number or number it is asking for in the error.
Still need help...I'll keep checking..