sqlplus error when trying to upgrade from 12.0 to 12.0.1

Hello everyone,

I'm trying to upgrade the Symantec DLP from 12.0. to 12.0.1. The upload of .jar file works fine, the wizard works but when it asks about the sqlplus executable an error is raised.

Here is the message:

An executable copy of sqlplus was not found at the location: /home/oracle/app/oracle/product/11.2.0/client_3/bin/sqlplus. The upgrader requires sqlplus to upgrade your Symantec DLP database. Please check your installation of Oracle Client Tools.

The problem is the file exists!

/home/oracle/app/oracle/product/11.2.0/client_3/bin
[root@server bin]# ls sqlplus
sqlplus
[root@server bin]#

When I installed 12.0 everything worked fine with ORACLE_BASE and ORACLE_HOME. But upgrading...

Thank you in advance.