in reply to DBD::ORACLE Installation problem

WHAT IS TWO_TASK ENVIRONEMTN VARIABLE.

I didn't know so I googled it, and got quite a few hits. A reasonable explanation is at http://www.fors.com/velpuri2/ERRORS/TWO-TASK%20COMMON%20ERRORS. It appears to be an environment variable used by the Oracle Two-task driver. Not really a Perl question though.