Perhaps you could supply us with some more details.
a) what database version
b) when environment are you using i.e. SQL*Plus, SQL*Developer etc.?
c) what is the 'task'?
Please read: Re: 2. How do I ask a question on the forums?
The problem is: "Your car does not start". You don't give us much context. We can't comment much better.
The SQL-02134 Error looks not like a direct error message from the oracle database. That would be ORA-xxxx.
I think it has something to do with some driver (odbc/C whatever) or other environment. Maybe ask in the forum fitting to that environment (which you din't mention).