Error loading report when data source changed

Question

We are migrating our Crystal Reports from using XML files generated from our SAP R3 system to using a direct connection to SAP R3 (using the SAP Integration Kit).
The code is straightforward:
      crReport = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
      crReport.Load(reportPath);
...where the reportPath is just a string with the path and filename (e.g. "C:\reports\Report1.rpt").
This worked fine with the report when it had an XML data source. When we run the code with the new version of the report that connects to a data table on our SAP R3 we get the following error message:
Error in File Report1 {40205567-F890-4B3C-A103-C9C8F0A1E665}.rpt: Failed to logon to the Crystal Report Object Repository.
The report is not in an Object Repository, nor do we even have a Repository in place right now. The report can be run manually from Crystal Reports on the desktop without any kind of Repository.
Both versions of the report were built in Crystal Reports 2008.
Thanks,
Byron

Answer 1

I am not sure if connecting to SAP is any different than connecting to SQL, but we develop one report and then deploy to N number of client who all have their own SQL servers and server names.
Here is the code I use to alter the database connection at runtime:
  connection.DatabaseName = _datebaseName;
                connection.ServerName = _serverName;
                if (_integratedSecurity)
                    connection.IntegratedSecurity = _integratedSecurity;
                else
                    connection.UserID = _userId;
                    connection.Password = _password;
                connection.Type = ConnectionInfoType.SQL;
                // First we assign the connection to all tables in the main report
                foreach (CrystalDecisions.CrystalReports.Engine.Table table in _reportDocument.Database.Tables)
                    AssignTableConnection(table, connection);
                foreach (CrystalDecisions.CrystalReports.Engine.Section section in _reportDocument.ReportDefinition.Sections)
                    // In each section we need to loop through all the reporting objects
                    foreach (CrystalDecisions.CrystalReports.Engine.ReportObject reportObject in section.ReportObjects)
                        if (reportObject.Kind == ReportObjectKind.SubreportObject)
                            SubreportObject subReport = (SubreportObject)reportObject;
                            ReportDocument subDocument = subReport.OpenSubreport(subReport.SubreportName);
                            foreach (CrystalDecisions.CrystalReports.Engine.Table table in subDocument.Database.Tables)
                                AssignTableConnection(table, connection);