Hi,
In BI 4.X, in order to connect with CMS database it is required to have 64-bit client installed on the server.
If you have also installed 32-bit Oracle client for Crystal reports 2011 along with the 64-bit Oracle client, Check if the following Environment variables are set properly:
Refer KBA 1906575 - What environment variables need to ser in AIX environment if CMS and
Reporting database is Oracle in SAP BI 4.0 ?.
Regards,
Rukaiya