I had this problem today. I'm guessing you used the ppm GUI to install DBD::Oracle. Uninstall it and install it via the command line ( ppm install DBD-oracle), you will now get a disclaimer which you need to agree to download oci.dll.

In reply to Re^2: problem using DBD::Oracle with Active State by Anonymous Monk
in thread problem using DBD::Oracle with Active State by chuckd

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