Hi,
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.
http://www.dba-oracle.com/t_sp_1503_unable...l_interface.htm*************************************************
>> Express edition of Oracle 11 database on one host (Windows 7)
Verify that the Oracle service and the Oracle listener processes are running.
You should see an oracle.exe process from the Windows server.
Before you try accessing Oracle from a client, try accessing Oracle from the server itself.
You can invoke sqlplus directly from the macghine where Oracle resides.
Get that working first!
Also, try these steps:
http://www.dba-oracle.com/t_troubleshootin...vity_errors.htm