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When using the following configuration, superscript symbols turn into the question mark:

Oracle Database 11.2.0.1.0 (x64)
Oracle Client 11.2.0.1.0 (for MS Windows x64)
dbexpoda40 5.1.2
CodeGear Delphi 2007

However, when we switch to the 32-bit Oracle Client, everything works fine.

Any help is appreciated.

Regards,
Tiago Santos

Hello,

The ability of developing 64-bit applications appeared since Delphi XE2, and therefore work with 64-bit client (64-bit OCI.dll library) is possible only since Delphi XE2. Please specify the exact versions of your Oracle client. Also please make a sample how you insert such data in the table

Our application is a 32-bit application, so I'm assuming it won't work with a 64-bit oracle client. Is this correct?

Hello,

Yes, a 32-bit application cannot use 64-bit libraries