Both Crystal Reports and Microsoft Access utilize the 32-bit ODBC connections, regardless of whether it's installed on a 64-bit machine. 

  1. Install the Oracle client for 32-bit (again, regardless of the fact that it's a 64-bit machine) in order to have the necessary driver which Crystal Reports needs to access. 
  2. Navigate to \\Windows\Syswow64\odbcad32.exe and double-click the odbcad32.exe to open it.  This will utilize the 32-bit version rather than the 64-bit ODBC Data Source Administrator which is opened by default.
  3. Create the ODBC connection within the 32-bit ODBC Data Source Administrator, according to Step 7 of Configuring your connection to Biotics 5.
The necessary Oracle driver will now be available.