Database logon info for this report is either incomplete or incorrect

I am scheduling a Crystal Reports 2008 report in the CMC. The report is reading data from an Oracle database via an ODBC and also from two .xls files stored locally and created via separate Crystal Reports 2008 reports run earlier in the day.

I know the ODBC connection works as it is the same connection used earlier. The .xls files are not password protected and the report runs fine away from the CMC.