error through interface program

Hi,
i have an existing dll which the program open a file , u give a new name to the file and it then imports it. The interface is done in Delphi. Its working fine with vb.


But now i have changed the existing dll into oracle compatibility. its running fine from dll while testing the importing the xml.
I have used in quiet of my scripts dual table from oracle.

But now when i am actually running through the interface its giving a error invalied object 'dual'.

What shd i do , please suggest. ihave to use dual in some of select statements. for eg select a sequence from dual.

please suggest as what can be done.

thankyou
regards
rajiv