Loans disappear from report after fields from second table are added

Question

We are using Crystal XI.  We have two tables from a sequel database we use for the reports, and we always have.  Suddenly, we have been experiencing problems with loans being dropped from the reports and we have been trying to isolate the problem.  To troubleshoot, I created a very simple report to provide the loan number and the borrower name from Table 1.  I did not create any parameters so the report provided the information for all loans in the database.  However, when I add a field to the report from Table 2, either all of the loans disappear or the number of loans on the report are drastically reduced.
As another test, I created a report to include just the loan number.  The loan number field appears in both tables.  I get different results if add the loan number to the report from Table 1 than I get if I add the loan number to the report from Table 2. When I create the report, the tables auto-link with no errors.  
I have reviewed all the report options and general options in Crystal and can't find why this is occurring.  I have had our IT staff troubleshoot and help me test using older versions of the tables, but we get the same results.  Any suggestions will be greatly appreciated.

Answer 1

From what you have described, could it be your table joins?  You mention that once you add the second table, records get dropped.
Check your table join, even though it auto links, right click on the link and see if the join is INNER or LEFT OUTER.
If INNER then every loan number in Table 1 should exist in Table 2, LEFT OUTER = every loan number in table 1 will be fetched irrespective of whether it has a corresponding match in table 2 or not.
Check your joins and change them and see if that makes a difference.