Hello
I have installed the Oracle 11g in local PC.
Do you have a supported OS for 11G ?
As you have already installed the Oracle 11G software is it done as per the SAP recommenations ?
Be aware that the environment settings like ORACLE_HOME, ORACL_BASE and others should be set according to the SAP recommendations.
https://websmp110.sap-ag.de/~sapdownload/011000358700000333942010E/GUIDE_UX_ORA_UPGR_112_302.pdf
https://websmp110.sap-ag.de/~sapdownload/011000358700000608442010E/win_ora_upgrade.pdf
Regards
RB