Applies To:
  • CitectSCADA 2.00 2.01

In Citect V2.00, when using SQL to connect to an Oracle database the Q&E driver loads a DLL every time the connection is made, without unloading it, which means that you will eventually run out of memory. 

As this is a problem in the Q&E driver for Oracle so we can only work around the problem.

* Make a connection on startup and keep it open all the time (assign the connection number to a memory PLC variable tag). The connection is automatically closed when Citect is shutdown. This problem should only occur with Oracle Version 7.0.