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Don Burleson Blog 







SP2-1503: Unable to initialize Oracle call interface tips

Oracle Database Tips by Donald BurlesonJune 6, 2015

Question:  I am not able to run the sqlplus command as Oracle. I get the following errors:

$ sqlplus

SP2-1503: Unable to initialize Oracle call interface
SP2-0152: ORACLE may not be functioning properly

What causes the SP-1503 and SP-0152 errors?

Answer: The oerr utility shows this for the SP-0152 error:

SP2-0152 ORACLE may not be functioning properly

Cause: Unable to initialize a session to the Oracle instance.

Action: Make a note of the message and the number, then contact the Database Administrator. 

This is the salient error, the SP-1503 error:

SP2-1503: Unable to initialize Oracle call interface

Cause: Indicates a library used by SQL*Plus to communicate with the database failed to initialize correctly.

Action: Check that the Oracle environment or registry entries are consistent and correct. If using the SQL*Plus Instant Client make sure the SQL*Plus and Oracle libraries are from the same release. Make sure you have read access to the libraries.

As we see, we need to verify the the environmental parameters are set correctly (LD_LIBRARY_PATH, ORACLE_HOME, ORACLE_SID), and verify that the Oracle service and the Oracle listener processes are running.

In Windows, you should see an oracle.exe process from the Windows server.  In UNIX/Linux, you will see the standard background processing running (PMON, SMON, &c).

Before you try accessing Oracle from a client, try accessing Oracle from the server itself.  You can invoke sqlplus directly from the machine where Oracle resides.

Then, you can look at accessing sql*Plus from a SQL*Net client.

Carefully follow these steps to diagnosing network connectivity errors.

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