Random SP2 error when starting oracle process through SHELL script

Question

Hi All,
I am trying to process data in n-Number of tables through a package. The package is called through a shell script to create start data processing. All calls to the package are in a sql script which is basically exec calls-
exec package.process ('T1','some param');
exec package.process ('T1','some param');
exec package.process ('T..n','some param');
I have a shell script which I use to execute commands from the sql script. There is a reason behind using shell script. For some strange reason, I keep on getting -
ERROR: logon denied - check for valid user with valid privileges
SP2-0640: Not connected
SP2-0641: "EXECUTE" requires connection to server
SP2-0640: Not connected
for some EXEC calls. Problem is, errors are generated at random. So in one run, I get error for T10,T11 and then in next run I might get for some other tables.
However, when I am running the sql script from the sql prompt, all calls to the package are executed without any problem.
This makes me think, it is something to do with the way database connection being initiated through UNIX.
Has anyone faced similar issue? Your help/gudence is much appreciated.
DB: Oracle 10.2.0.5
OS: SUN Solaris 10
Thanks in advance.

Answer 1

Login credentials are provided inside the shell script.
I did put a sleep(10) after EOF but no help. As mentioned if I run script file from sql promt, it runs without any hiccup. So it is the connection through the UNIX that is causing issue.
As pointed out by Sybrand, I agree that it does not make a sense to connect and commit after every sql statement. So decided to change the shell script and so far, the result from my initial tests on a sample data is quite encouraging. Hopefully I will have a solution.
But it will be nice to know why SHELL is doing what it is doing!!
Legacy prog are sometime big time eye-openers..;)