Oracle SP2-1503


SP2-1503 Error Oracle 11g.


SP2-1503 : Unable to initialize Oracle call interface.


SP2-0152: ORACLE may not be functioning properly.



This error is due to version mismatch between the binaries of the sqlplus called and the listener, instance running in the server.

Action taken :

The system contained 2 Oracle homes as shown below



The environment variable “Path” contained the bin path of both the installation. Note that we try to start 10g, but the bin path of 11g comes first in the “Path” variable.


As a result of this, version mismatch happened during the call. The sqlplus called is 10g and the listener called is in 11g. Due to this version mismatch problem, we faced the error SP-1503.
Modify the path variable and remove the bin path of 11g and try again. Or you can change the order of bin path.



Lsnrctl of 10g is now started correctly. The instance will start correctly now.







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