Hi,
Can you please check that orasid has the Oracle_home env defined.
The ORACLE_HOME should be /oracle/SID/102_64.
Can you please check that the /oracle/SID/102_64 is valid mount point and proper permission in case you have installed 10G.
Few more questions...
Did you install oracle before starting the sapinst?
Did you install oracle using orasid?
Thanks
Rishi Abrol