Unable to display data of the formula fields in the reports after pointing to the new database

Hi Experts,

We are using CR XI R2 and recently we have changed the database and pointed to the new database which us Oracle10g. I can run few reports without any issue but few reports are displaying the blank reports as the formula fields are not responding. Can Anyone help me with the reason? Any suggestions to fix it??

Thanks,

Samrat Muddasani